diff --git a/modules/cache.js b/modules/cache.js
index 5838a80..8d0bb42 100644
--- a/modules/cache.js
+++ b/modules/cache.js
@@ -92,41 +92,41 @@ exp.info = function(callback) {
   });
 };
 
-// sets the timestamp for +uuid+ and its face file's date to now
-exp.update_timestamp = function(rid, uuid, hash) {
+// sets the timestamp for +userId+ and its face file's date to now
+exp.update_timestamp = function(rid, userId, hash) {
   logging.log(rid + "cache: updating timestamp");
   var time = new Date().getTime();
-  // store uuid in lower case if not null
-  uuid = uuid && uuid.toLowerCase();
-  redis.hmset(uuid, "t", time);
+  // store userId in lower case if not null
+  userId = userId && userId.toLowerCase();
+  redis.hmset(userId, "t", time);
   update_file_date(rid, hash);
 };
 
-// create the key +uuid+, store +skin+ hash, +cape+ hash and time
-exp.save_hash = function(rid, uuid, skin, cape) {
+// create the key +userId+, store +skin+ hash, +cape+ hash and time
+exp.save_hash = function(rid, userId, skin, cape) {
   logging.log(rid + "cache: saving hash");
   logging.log(rid + "skin:" + skin + " cape:" + cape);
   var time = new Date().getTime();
   // store shorter null byte instead of "null"
   skin = skin || ".";
   cape = cape || ".";
-  // store uuid in lower case if not null
-  uuid = uuid && uuid.toLowerCase();
-  redis.hmset(uuid, "s", skin, "c", cape, "t", time);
+  // store userId in lower case if not null
+  userId = userId && userId.toLowerCase();
+  redis.hmset(userId, "s", skin, "c", cape, "t", time);
 };
 
-exp.remove_hash = function(rid, uuid) {
+exp.remove_hash = function(rid, userId) {
   logging.log(rid + "cache: deleting hash");
-  redis.del(uuid.toLowerCase(), "h", "t");
+  redis.del(userId.toLowerCase(), "h", "t");
 };
 
-// get a details object for +uuid+
+// get a details object for +userId+
 // {skin: "0123456789abcdef", cape: "gs1gds1g5d1g5ds1", time: 1414881524512}
-// null when uuid unkown
-exp.get_details = function(uuid, callback) {
-  // get uuid in lower case if not null
-  uuid = uuid && uuid.toLowerCase();
-  redis.hgetall(uuid, function(err, data) {
+// null when userId unkown
+exp.get_details = function(userId, callback) {
+  // get userId in lower case if not null
+  userId = userId && userId.toLowerCase();
+  redis.hgetall(userId, function(err, data) {
     var details = null;
     if (data) {
       details = {
diff --git a/modules/helpers.js b/modules/helpers.js
index 78c98d6..5338372 100644
--- a/modules/helpers.js
+++ b/modules/helpers.js
@@ -7,7 +7,7 @@ var renders = require("./renders");
 var fs = require("fs");
 
 // 0098cb60-fa8e-427c-b299-793cbd302c9a
-var valid_uuid = /^([0-9a-f-A-F-]{32,36}|[a-zA-Z0-9_]{1,16})$/; // uuid|username
+var valid_user_id = /^([0-9a-f-A-F-]{32,36}|[a-zA-Z0-9_]{1,16})$/; // uuid|username
 var hash_pattern = /[0-9a-f]+$/;
 
 // gets the hash from the textures.minecraft.net +url+
@@ -15,12 +15,12 @@ function get_hash(url) {
   return hash_pattern.exec(url)[0].toLowerCase();
 }
 
-function store_skin(rid, uuid, profile, details, callback) {
-  networking.get_skin_url(rid, uuid, profile, function(url) {
+function store_skin(rid, userId, profile, details, callback) {
+  networking.get_skin_url(rid, userId, profile, function(url) {
     if (url) {
       var hash = get_hash(url);
       if (details && details.skin === hash) {
-        cache.update_timestamp(rid, uuid, hash);
+        cache.update_timestamp(rid, userId, hash);
         callback(null, hash);
       } else {
         logging.log(rid + "new skin hash: " + hash);
@@ -59,12 +59,12 @@ function store_skin(rid, uuid, profile, details, callback) {
   });
 }
 
-function store_cape(rid, uuid, profile, details, callback) {
-  networking.get_cape_url(rid, uuid, profile, function(url) {
+function store_cape(rid, userId, profile, details, callback) {
+  networking.get_cape_url(rid, userId, profile, function(url) {
     if (url) {
       var hash = get_hash(url);
       if (details && details.cape === hash) {
-        cache.update_timestamp(rid, uuid, hash);
+        cache.update_timestamp(rid, userId, hash);
         callback(null, hash);
       } else {
         logging.log(rid + "new cape hash: " + hash);
@@ -94,15 +94,15 @@ function store_cape(rid, uuid, profile, details, callback) {
   });
 }
 
-// used by store_images to queue simultaneous requests for identical uuid
+// used by store_images to queue simultaneous requests for identical userId
 // the first request has to be completed until all others are continued
 var currently_running = [];
-// calls back all queued requests that match uuid and type
-function callback_for(uuid, type, err, hash) {
+// calls back all queued requests that match userId and type
+function callback_for(userId, type, err, hash) {
   var req_count = 0;
   for (var i = 0; i < currently_running.length; i++) {
     var current = currently_running[i];
-    if (current.uuid === uuid && current.type === type) {
+    if (current.userid === userId && current.type === type) {
       req_count++;
       if (req_count !== 1) {
         // otherwise this would show up on single/first requests, too
@@ -114,7 +114,7 @@ function callback_for(uuid, type, err, hash) {
     }
   }
   if (req_count > 1) {
-    logging.debug(req_count + " simultaneous requests for " + uuid);
+    logging.debug(req_count + " simultaneous requests for " + userId);
   }
 }
 
@@ -128,30 +128,30 @@ function deep_property_check(arr, property, value) {
   return false;
 }
 
-// downloads the images for +uuid+ while checking the cache
+// downloads the images for +userId+ while checking the cache
 // status based on +details+. +type+ specifies which
 // image type should be called back on
 // +callback+ contains the error buffer and image hash
-function store_images(rid, uuid, details, type, callback) {
-  var is_uuid = uuid.length > 16;
+function store_images(rid, userId, details, type, callback) {
+  var is_uuid = userId.length > 16;
   var new_hash = {
     rid: rid,
-    uuid: uuid,
+    userid: userId,
     type: type,
     callback: callback
   };
-  if (!deep_property_check(currently_running, "uuid", uuid)) {
+  if (!deep_property_check(currently_running, "userid", userId)) {
     currently_running.push(new_hash);
-    networking.get_profile(rid, (is_uuid ? uuid : null), function(err, profile) {
+    networking.get_profile(rid, (is_uuid ? userId : null), function(err, profile) {
       if (err || (is_uuid && !profile)) {
-        callback_for(uuid, type, err, null);
+        callback_for(userId, type, err, null);
       } else {
-        store_skin(rid, uuid, profile, details, function(err, skin_hash) {
-          cache.save_hash(rid, uuid, skin_hash, null);
-          callback_for(uuid, "skin", err, skin_hash);
-          store_cape(rid, uuid, profile, details, function(err, cape_hash) {
-            cache.save_hash(rid, uuid, skin_hash, cape_hash);
-            callback_for(uuid, "cape", err, cape_hash);
+        store_skin(rid, userId, profile, details, function(err, skin_hash) {
+          cache.save_hash(rid, userId, skin_hash, null);
+          callback_for(userId, "skin", err, skin_hash);
+          store_cape(rid, userId, profile, details, function(err, cape_hash) {
+            cache.save_hash(rid, userId, skin_hash, cape_hash);
+            callback_for(userId, "cape", err, cape_hash);
           });
         });
       }
@@ -164,10 +164,10 @@ function store_images(rid, uuid, details, type, callback) {
 
 var exp = {};
 
-// returns true if the +uuid+ is a valid uuid or username
-// the uuid may be not exist, however
-exp.uuid_valid = function(uuid) {
-  return valid_uuid.test(uuid);
+// returns true if the +userId+ is a valid userId or username
+// the userId may be not exist, however
+exp.id_valid = function(userId) {
+  return valid_user_id.test(userId);
 };
 
 // decides whether to get an image from disk or to download it
@@ -178,22 +178,22 @@ exp.uuid_valid = function(uuid) {
 //   1: "cached" - found on disk
 //   2: "downloaded" - profile downloaded, skin downloaded from mojang servers
 //   3: "checked" - profile re-downloaded (was too old), but it has either not changed or has no skin
-exp.get_image_hash = function(rid, uuid, raw_type, callback) {
-  cache.get_details(uuid, function(err, details) {
+exp.get_image_hash = function(rid, userId, raw_type, callback) {
+  cache.get_details(userId, function(err, details) {
     var type = (details !== null ? (raw_type === "skin" ? details.skin : details.cape) : null);
     if (err) {
       callback(err, -1, null);
     } else {
       if (details && details.time + config.local_cache_time * 1000 >= new Date().getTime()) {
-        logging.log(rid + "uuid cached & recently updated");
+        logging.log(rid + "userId cached & recently updated");
         callback(null, (type ? 1 : 0), type);
       } else {
         if (details) {
-          logging.log(rid + "uuid cached, but too old");
+          logging.log(rid + "userId cached, but too old");
         } else {
-          logging.log(rid + "uuid not cached");
+          logging.log(rid + "userId not cached");
         }
-        store_images(rid, uuid, details, raw_type, function(err, hash) {
+        store_images(rid, userId, details, raw_type, function(err, hash) {
           if (err) {
             callback(err, -1, details && type);
           } else {
@@ -209,12 +209,12 @@ exp.get_image_hash = function(rid, uuid, raw_type, callback) {
 };
 
 
-// handles requests for +uuid+ avatars with +size+
+// handles requests for +userId+ avatars with +size+
 // callback contains error, status, image buffer, hash
 // image is the user's face+helm when helm is true, or the face otherwise
 // for status, see get_image_hash
-exp.get_avatar = function(rid, uuid, helm, size, callback) {
-  exp.get_image_hash(rid, uuid, "skin", function(err, status, hash) {
+exp.get_avatar = function(rid, userId, helm, size, callback) {
+  exp.get_image_hash(rid, userId, "skin", function(err, status, hash) {
     if (hash) {
       var facepath = __dirname + "/../" + config.faces_dir + hash + ".png";
       var helmpath = __dirname + "/../" + config.helms_dir + hash + ".png";
@@ -234,17 +234,17 @@ exp.get_avatar = function(rid, uuid, helm, size, callback) {
         });
       });
     } else {
-      // hash is null when uuid has no skin
+      // hash is null when userId has no skin
       callback(err, status, null, null);
     }
   });
 };
 
-// handles requests for +uuid+ skins
+// handles requests for +userId+ skins
 // callback contains error, hash, image buffer
-exp.get_skin = function(rid, uuid, callback) {
+exp.get_skin = function(rid, userId, callback) {
   logging.log(rid + "skin request");
-  exp.get_image_hash(rid, uuid, "skin", function(err, status, hash) {
+  exp.get_image_hash(rid, userId, "skin", function(err, status, hash) {
     var skinpath = __dirname + "/../" + config.skins_dir + hash + ".png";
     fs.exists(skinpath, function(exists) {
       if (exists) {
@@ -268,8 +268,8 @@ function get_type(helm, body) {
 
 // handles creations of skin renders
 // callback contanis error, hash, image buffer
-exp.get_render = function(rid, uuid, scale, helm, body, callback) {
-  exp.get_skin(rid, uuid, function(err, hash, img) {
+exp.get_render = function(rid, userId, scale, helm, body, callback) {
+  exp.get_skin(rid, userId, function(err, hash, img) {
     if (!hash) {
       callback(err, -1, hash, null);
       return;
@@ -305,11 +305,11 @@ exp.get_render = function(rid, uuid, scale, helm, body, callback) {
   });
 };
 
-// handles requests for +uuid+ capes
+// handles requests for +userId+ capes
 // callback contains error, hash, image buffer
-exp.get_cape = function(rid, uuid, callback) {
+exp.get_cape = function(rid, userId, callback) {
   logging.log(rid + "cape request");
-  exp.get_image_hash(rid, uuid, "cape", function(err, status, hash) {
+  exp.get_image_hash(rid, userId, "cape", function(err, status, hash) {
     if (!hash) {
       callback(err, null, null);
       return;
diff --git a/modules/networking.js b/modules/networking.js
index 8972936..3f776f6 100644
--- a/modules/networking.js
+++ b/modules/networking.js
@@ -119,28 +119,28 @@ exp.get_profile = function(rid, uuid, callback) {
   }
 };
 
-// +uuid+ is likely a username and if so
-// +uuid+ is used to get the url, otherwise
+// +userId+ is likely a username and if so
+// +userId+ is used to get the url, otherwise
 // +profile+ will be used to get the url
-exp.get_skin_url = function(rid, uuid, profile, callback) {
-  get_url(rid, uuid, profile, 0, function(url) {
+exp.get_skin_url = function(rid, userId, profile, callback) {
+  get_url(rid, userId, profile, 0, function(url) {
     callback(url);
   });
 };
 
-// +uuid+ is likely a username and if so
-// +uuid+ is used to get the url, otherwise
+// +userId+ is likely a username and if so
+// +userId+ is used to get the url, otherwise
 // +profile+ will be used to get the url
-exp.get_cape_url = function(rid, uuid, profile, callback) {
-  get_url(rid, uuid, profile, 1, function(url) {
+exp.get_cape_url = function(rid, userId, profile, callback) {
+  get_url(rid, userId, profile, 1, function(url) {
     callback(url);
   });
 };
 
-function get_url(rid, uuid, profile, type, callback) {
-  if (uuid.length <= 16) {
+function get_url(rid, userId, profile, type, callback) {
+  if (userId.length <= 16) {
     //username
-    exp.get_username_url(rid, uuid, type, function(err, url) {
+    exp.get_username_url(rid, userId, type, function(err, url) {
       callback(url || null);
     });
   } else {
diff --git a/modules/skins.js b/modules/skins.js
index 73119b3..d2b31ea 100644
--- a/modules/skins.js
+++ b/modules/skins.js
@@ -84,9 +84,9 @@ exp.resize_img = function(inname, size, callback) {
   });
 };
 
-// returns "alex" or "steve" calculated by the +uuid+
-exp.default_skin = function(uuid) {
-  if (Number("0x" + uuid[31]) % 2 === 0) {
+// returns "alex" or "steve" calculated by the +userId+
+exp.default_skin = function(userId) {
+  if (Number("0x" + userId[31]) % 2 === 0) {
     return "alex";
   } else {
     return "steve";
diff --git a/routes/avatars.js b/routes/avatars.js
index d8ccf99..09f0561 100644
--- a/routes/avatars.js
+++ b/routes/avatars.js
@@ -15,7 +15,7 @@ var human_status = {
 // GET avatar request
 module.exports = function(req, res) {
   var start = new Date();
-  var uuid = (req.url.path_list[2] || "").split(".")[0];
+  var userId = (req.url.path_list[2] || "").split(".")[0];
   var size = parseInt(req.url.query.size) || config.default_size;
   var def = req.url.query.default;
   var helm = req.url.query.hasOwnProperty("helm");
@@ -32,27 +32,27 @@ module.exports = function(req, res) {
     });
     res.end("Invalid Size");
     return;
-  } else if (!helpers.uuid_valid(uuid)) {
+  } else if (!helpers.id_valid(userId)) {
     res.writeHead(422, {
       "Content-Type": "text/plain",
       "Response-Time": new Date() - start
     });
-    res.end("Invalid UUID");
+    res.end("Invalid ID");
     return;
   }
 
   // strip dashes
-  uuid = uuid.replace(/-/g, "");
-  logging.log(rid + "uuid: " + uuid);
+  userId = userId.replace(/-/g, "");
+  logging.log(rid + "userid: " + userId);
 
   try {
-    helpers.get_avatar(rid, uuid, helm, size, function(err, status, image, hash) {
+    helpers.get_avatar(rid, userId, helm, size, function(err, status, image, hash) {
       logging.log(rid + "storage type: " + human_status[status]);
       if (err) {
         logging.error(rid + err);
         if (err.code === "ENOENT") {
           // no such file
-          cache.remove_hash(rid, uuid);
+          cache.remove_hash(rid, userId);
         }
       }
       etag = image && hash && hash.substr(0, 32) || "none";
@@ -68,15 +68,15 @@ module.exports = function(req, res) {
         logging.debug(rid + "matches: " + matches);
         sendimage(rid, http_status, status, image);
       } else {
-        handle_default(rid, 404, status, uuid);
+        handle_default(rid, 404, status, userId);
       }
     });
   } catch(e) {
     logging.error(rid + "error: " + e.stack);
-    handle_default(rid, 500, -1, uuid);
+    handle_default(rid, 500, -1, userId);
   }
 
-  function handle_default(rid, http_status, img_status, uuid) {
+  function handle_default(rid, http_status, img_status, userId) {
     if (def && def !== "steve" && def !== "alex") {
       logging.log(rid + "status: 301");
       res.writeHead(301, {
@@ -89,7 +89,7 @@ module.exports = function(req, res) {
       });
       res.end();
     } else {
-      def = def || skins.default_skin(uuid);
+      def = def || skins.default_skin(userId);
       skins.resize_img("public/images/" + def + ".png", size, function(err, image) {
         sendimage(rid, http_status, img_status, image);
       });
diff --git a/routes/capes.js b/routes/capes.js
index 9070fa9..ae97911 100644
--- a/routes/capes.js
+++ b/routes/capes.js
@@ -13,11 +13,11 @@ var human_status = {
 // GET cape request
 module.exports = function(req, res) {
   var start = new Date();
-  var uuid = (req.url.pathname.split("/")[2] || "").split(".")[0];
+  var userId = (req.url.pathname.split("/")[2] || "").split(".")[0];
   var etag = null;
   var rid = req.id;
 
-  if (!helpers.uuid_valid(uuid)) {
+  if (!helpers.id_valid(userId)) {
     res.writeHead(422, {
       "Content-Type": "text/plain",
       "Response-Time": new Date() - start
@@ -27,17 +27,17 @@ module.exports = function(req, res) {
   }
 
   // strip dashes
-  uuid = uuid.replace(/-/g, "");
-  logging.log(rid + "uuid: " + uuid);
+  userId = userId.replace(/-/g, "");
+  logging.log(rid + "userid: " + userId);
 
   try {
-    helpers.get_cape(rid, uuid, function(err, status, image, hash) {
+    helpers.get_cape(rid, userId, function(err, status, image, hash) {
       logging.log(rid + "storage type: " + human_status[status]);
       if (err) {
         logging.error(rid + err);
         if (err.code == "ENOENT") {
           // no such file
-          cache.remove_hash(rid, uuid);
+          cache.remove_hash(rid, userId);
         }
       }
       etag = hash && hash.substr(0, 32) || "none";
diff --git a/routes/renders.js b/routes/renders.js
index 712fb7a..930758c 100644
--- a/routes/renders.js
+++ b/routes/renders.js
@@ -34,7 +34,7 @@ module.exports = function(req, res) {
   }
 
   var body = raw_type === "body";
-  var uuid = (req.url.path_list[3] || "").split(".")[0];
+  var userId = (req.url.path_list[3] || "").split(".")[0];
   var def = req.url.query.default;
   var scale = parseInt(req.url.query.scale) || config.default_scale;
   var helm = req.url.query.hasOwnProperty("helm");
@@ -47,27 +47,27 @@ module.exports = function(req, res) {
     });
     res.end("422 Invalid Scale");
     return;
-  } else if (!helpers.uuid_valid(uuid)) {
+  } else if (!helpers.id_valid(userId)) {
     res.writeHead(422, {
       "Content-Type": "text/plain",
       "Response-Time": new Date() - start
     });
-    res.end("422 Invalid UUID");
+    res.end("422 Invalid ID");
     return;
   }
 
   // strip dashes
-  uuid = uuid.replace(/-/g, "");
-  logging.log(rid + "uuid: " + uuid);
+  userId = userId.replace(/-/g, "");
+  logging.log(rid + "userId: " + userId);
 
   try {
-    helpers.get_render(rid, uuid, scale, helm, body, function(err, status, hash, image) {
+    helpers.get_render(rid, userId, scale, helm, body, function(err, status, hash, image) {
       logging.log(rid + "storage type: " + human_status[status]);
       if (err) {
         logging.error(rid + err);
         if (err.code == "ENOENT") {
           // no such file
-          cache.remove_hash(rid, uuid);
+          cache.remove_hash(rid, userId);
         }
       }
       etag = hash && hash.substr(0, 32) || "none";
@@ -84,18 +84,18 @@ module.exports = function(req, res) {
         sendimage(rid, http_status, status, image);
       } else {
         logging.log(rid + "image not found, using default.");
-        handle_default(rid, 404, status, uuid);
+        handle_default(rid, 404, status, userId);
       }
     });
   } catch(e) {
     logging.error(rid + "error: " + e.stack);
-    handle_default(rid, 500, -1, uuid);
+    handle_default(rid, 500, -1, userId);
   }
 
 
   // default alex/steve images can be rendered, but
   // custom images will not be
-  function handle_default(rid, http_status, img_status, uuid) {
+  function handle_default(rid, http_status, img_status, userId) {
     if (def && def !== "steve" && def !== "alex") {
       logging.log(rid + "status: 301");
       res.writeHead(301, {
@@ -108,7 +108,7 @@ module.exports = function(req, res) {
       });
       res.end();
     } else {
-      def = def || skins.default_skin(uuid);
+      def = def || skins.default_skin(userId);
       fs.readFile("public/images/" + def + "_skin.png", function (err, buf) {
         if (err) {
           // errored while loading the default image, continuing with null image
diff --git a/routes/skins.js b/routes/skins.js
index 8563d8e..0268855 100644
--- a/routes/skins.js
+++ b/routes/skins.js
@@ -7,26 +7,26 @@ var lwip = require("lwip");
 // GET skin request
 module.exports = function(req, res) {
   var start = new Date();
-  var uuid = (req.url.path_list[2] || "").split(".")[0];
+  var userId = (req.url.path_list[2] || "").split(".")[0];
   var def = req.url.query.default;
   var etag = null;
   var rid = req.id;
 
-  if (!helpers.uuid_valid(uuid)) {
+  if (!helpers.id_valid(userId)) {
     res.writeHead(422, {
       "Content-Type": "text/plain",
       "Response-Time": new Date() - start
     });
-    res.end("Invalid UUID");
+    res.end("Invalid ID");
     return;
   }
 
   // strip dashes
-  uuid = uuid.replace(/-/g, "");
-  logging.log(rid + "uuid: " + uuid);
+  userId = userId.replace(/-/g, "");
+  logging.log(rid + "userid: " + userId);
 
   try {
-    helpers.get_skin(rid, uuid, function(err, hash, image) {
+    helpers.get_skin(rid, userId, function(err, hash, image) {
       if (err) {
         logging.error(rid + err);
       }
@@ -43,15 +43,15 @@ module.exports = function(req, res) {
         logging.debug(rid + "matches: " + matches);
         sendimage(rid, http_status, image);
       } else {
-        handle_default(rid, 404, uuid);
+        handle_default(rid, 404, userId);
       }
     });
   } catch(e) {
     logging.error(rid + "error: " + e.stack);
-    handle_default(rid, 500, uuid);
+    handle_default(rid, 500, userId);
   }
 
-  function handle_default(rid, http_status, uuid) {
+  function handle_default(rid, http_status, userId) {
     if (def && def !== "steve" && def !== "alex") {
       logging.log(rid + "status: 301");
       res.writeHead(301, {
@@ -64,7 +64,7 @@ module.exports = function(req, res) {
       });
       res.end();
     } else {
-      def = def || skins.default_skin(uuid);
+      def = def || skins.default_skin(userId);
       lwip.open("public/images/" + def + "_skin.png", function(err, image) {
         image.toBuffer("png", function(err, buffer) {
           sendimage(rid, http_status, buffer);
diff --git a/test/test.js b/test/test.js
index de079e4..c6aa8fe 100644
--- a/test/test.js
+++ b/test/test.js
@@ -47,43 +47,43 @@ describe("Crafatar", function() {
 
   describe("UUID/username", function() {
     it("non-hex uuid is invalid", function(done) {
-      assert.strictEqual(helpers.uuid_valid("g098cb60fa8e427cb299793cbd302c9a"), false);
+      assert.strictEqual(helpers.id_valid("g098cb60fa8e427cb299793cbd302c9a"), false);
       done();
     });
     it("empty id is invalid", function(done) {
-      assert.strictEqual(helpers.uuid_valid(""), false);
+      assert.strictEqual(helpers.id_valid(""), false);
       done();
     });
     it("non-alphanumeric username is invalid", function(done) {
-      assert.strictEqual(helpers.uuid_valid("usernäme"), false);
+      assert.strictEqual(helpers.id_valid("usernäme"), false);
       done();
     });
     it("dashed username is invalid", function(done) {
-      assert.strictEqual(helpers.uuid_valid("user-name"), false);
+      assert.strictEqual(helpers.id_valid("user-name"), false);
       done();
     });
     it(">16 length username is invalid", function(done) {
-      assert.strictEqual(helpers.uuid_valid("ThisNameIsTooLong"), false);
+      assert.strictEqual(helpers.id_valid("ThisNameIsTooLong"), false);
       done();
     });
     it("lowercase uuid is valid", function(done) {
-      assert.strictEqual(helpers.uuid_valid("0098cb60fa8e427cb299793cbd302c9a"), true);
+      assert.strictEqual(helpers.id_valid("0098cb60fa8e427cb299793cbd302c9a"), true);
       done();
     });
     it("uppercase uuid is valid", function(done) {
-      assert.strictEqual(helpers.uuid_valid("1DCEF164FF0A47F2B9A691385C774EE7"), true);
+      assert.strictEqual(helpers.id_valid("1DCEF164FF0A47F2B9A691385C774EE7"), true);
       done();
     });
     it("dashed uuid is valid", function(done) {
-      assert.strictEqual(helpers.uuid_valid("0098cb60-fa8e-427c-b299-793cbd302c9a"), true);
+      assert.strictEqual(helpers.id_valid("0098cb60-fa8e-427c-b299-793cbd302c9a"), true);
       done();
     });
     it("16 chars, underscored, capital, numbered username is valid", function(done) {
-      assert.strictEqual(helpers.uuid_valid("__niceUs3rname__"), true);
+      assert.strictEqual(helpers.id_valid("__niceUs3rname__"), true);
       done();
     });
     it("1 char username is valid", function(done) {
-      assert.strictEqual(helpers.uuid_valid("a"), true);
+      assert.strictEqual(helpers.id_valid("a"), true);
       done();
     });
     it("should not exist (uuid)", function(done) {