diff --git a/modules/databaseGlobals.js b/modules/databaseGlobals.js
index ec87549..8af8308 100644
--- a/modules/databaseGlobals.js
+++ b/modules/databaseGlobals.js
@@ -64,16 +64,11 @@ function initializeDatabase() {
             key TEXT NOT NULL UNIQUE,
             productId INTEGER NOT NULL,
             targetIhannel TEXT NOT NULL,
-            userId INTEGER DEFAULT NULL,
             usedAt TEXT,
             
             FOREIGN KEY(productId)
                 REFERENCES products(id)
                 ON DELETE CASCADE,
-
-            FOREIGN KEY(userId)
-                REFERENCES accounts(id)
-                ON DELETE SET NULL
         )
     `)
 }
diff --git a/repositories/licenceRepository.js b/repositories/licenseRepository.js
similarity index 62%
rename from repositories/licenceRepository.js
rename to repositories/licenseRepository.js
index 5075ef8..68aafd8 100644
--- a/repositories/licenceRepository.js
+++ b/repositories/licenseRepository.js
@@ -5,13 +5,10 @@ function create(key, productId, targetChannel) {
         INSERT INTO licenses (
             key,
             productId,
-            targetChannel
-        )
-        VALUES (
-            ?,
-            ?,
-            ?
+            targetChannel,
+            status
         )
+        VALUES (?, ?, ?, 'active')
     `
     const statement = database.prepare(query)
     return statement.run(key, productId, targetChannel)
@@ -19,7 +16,7 @@ function create(key, productId, targetChannel) {
 
 function findByKey(key) {
     const query = `
-        SELECT id, key, productId, targetChannel, userId, usedAt
+        SELECT id, key, productId, targetChannel, status, createdAt
             FROM licenses
             WHERE key = ?
     `
@@ -27,24 +24,14 @@ function findByKey(key) {
     return statement.get(key)
 }
 
-function activate(licenseId, userId) {
+function updateStatus(id, status) {
     const query = `
         UPDATE licenses
-            SET userId = ?, usedAt = CURRENT_TIMESTAMP
-            WHERE id = ? AND userId IS NULL
+            SET status = ?
+            WHERE id = ?
     `
     const statement = database.prepare(query)
-    return statement.run(userId, licenseId)
-}
-
-function deactivate(licenseId, userId) {
-    const query = `
-        UPDATE licenses
-            SET userId = ?, usedAt = NULL
-            WHERE id = ? AND userId IS NULL
-    `
-    const statement = database.prepare(query)
-    return statement.run(userId, licenseId)
+    return statement.run(status, id)
 }
 
 function findByProduct(productId) {
@@ -68,8 +55,7 @@ function remove(id) {
 module.exports = {
     create,
     remove,
-    activate,
     findByKey,
-    deactivate,
+    updateStatus,
     findByProduct,
 }
\ No newline at end of file
diff --git a/repositories/permissionsRepository.js b/repositories/permissionsRepository.js
index 6156eb3..cd5ba24 100644
--- a/repositories/permissionsRepository.js
+++ b/repositories/permissionsRepository.js
@@ -53,9 +53,26 @@ function revokeAllOnProduct(userId, productId) {
     return statement.run(userId, productId)
 }
 
+function hasPermission(userId, productName, channel, permission) {
+    const query = `
+        SELECT 1 FROM permissions p
+        JOIN products pr ON p.product_id = pr.id
+        WHERE p.user_id = ? 
+        AND pr.name = ?
+        AND (p.channel = ? OR p.channel = '*')
+        AND p.permission_key = ?
+    `
+
+    const stmt = db.prepare(query)
+    const result = stmt.get(userId, productName, channel, permission)
+
+    return !!result
+}
+
 module.exports = {
     grant,
     revoke,
+    hasPermission,
+    revokeAllOnProduct,
     findByUserAndProduct,
-    revokeAllOnProduct
-};
\ No newline at end of file
+}
\ No newline at end of file
diff --git a/repositories/userRepository.js b/repositories/userRepository.js
index 4b507d8..2f8f004 100644
--- a/repositories/userRepository.js
+++ b/repositories/userRepository.js
@@ -59,27 +59,10 @@ function findById(identifier) {
     return statement.get(identifier)
 }
 
-function hasPermission(userId, productName, channel, permission) {
-    const query = `
-        SELECT 1 FROM permissions p
-        JOIN products pr ON p.product_id = pr.id
-        WHERE p.user_id = ? 
-        AND pr.name = ?
-        AND (p.channel = ? OR p.channel = '*')
-        AND p.permission_key = ?
-    `
-
-    const stmt = db.prepare(query)
-    const result = stmt.get(userId, productName, channel, permission)
-
-    return !!result
-}
-
 module.exports = {
     remove,
     register,
     findById,
-    hasPermission,
     findByUsername,
     changePassword,
 }
\ No newline at end of file
diff --git a/services/licenseService.js b/services/licenseService.js
new file mode 100644
index 0000000..530254c
--- /dev/null
+++ b/services/licenseService.js
@@ -0,0 +1,77 @@
+const licenceRepository = require("../repositories/licenceRepository")
+const logger = require("../modules/logger")
+const { DefaultError } = require("../errors/errors")
+
+async function create({ key, productId, targetChannel }) {
+    const existing = licenceRepository.findByKey(key)
+    if (existing) {
+        throw new DefaultError(409, "License key already exists.")
+    }
+
+    try {
+        return licenceRepository.create(key, productId, targetChannel)
+    } catch (error) {
+        logger.error(error, ["Service", "yellow", "LICENSE", "green"])
+        throw new DefaultError(500, "Please contact the maintainer")
+    }
+}
+
+function getLicenseByKey(key) {
+    try {
+        const license = licenceRepository.findByKey(key)
+        if (!license) {
+            throw new DefaultError(404, "License not found.")
+        }
+        return license
+    } catch (error) {
+        if (error instanceof DefaultError) throw error
+        logger.error(error, ["Service", "yellow", "LICENSE", "green"])
+        throw new DefaultError(500, "Please contact the maintainer")
+    }
+}
+
+async function updateStatus(id, status) {
+    try {
+        const result = licenceRepository.updateStatus(id, status)
+        if (result.changes === 0) {
+            throw new DefaultError(404, "License not found, status update failed.")
+        }
+        return result
+    } catch (error) {
+        if (error instanceof DefaultError) throw error
+        logger.error(error, ["Service", "yellow", "LICENSE", "green"])
+        throw new DefaultError(500, "Please contact the maintainer")
+    }
+}
+
+function listByProduct(productId) {
+    try {
+        const licenses = licenceRepository.findByProduct(productId)
+        return licenses
+    } catch (error) {
+        logger.error(error, ["Service", "yellow", "LICENSE", "green"])
+        throw new DefaultError(500, "Please contact the maintainer")
+    }
+}
+
+async function remove(id) {
+    try {
+        const result = licenceRepository.remove(id)
+        if (result.changes === 0) {
+            throw new DefaultError(404, "License not found.")
+        }
+        return result
+    } catch (error) {
+        if (error instanceof DefaultError) throw error
+        logger.error(error, ["Service", "yellow", "LICENSE", "green"])
+        throw new DefaultError(500, "Please contact the maintainer")
+    }
+}
+
+module.exports = {
+    create,
+    getLicenseByKey,
+    updateStatus,
+    listByProduct,
+    remove
+}
\ No newline at end of file
diff --git a/services/permissionsService.js b/services/permissionsService.js
new file mode 100644
index 0000000..b8a1cda
--- /dev/null
+++ b/services/permissionsService.js
@@ -0,0 +1,72 @@
+const permissionsRepository = require("../repositories/permissionsRepository")
+const userRepository = require("../repositories/userRepository")
+const logger = require("../modules/logger")
+const { DefaultError } = require("../errors/errors")
+
+async function grant({ userId, productId, channel, permissionKey }) {
+    const user = userRepository.findById(userId)
+    if (!user) {
+        throw new DefaultError(404, "User not found.")
+    }
+
+    try {
+        return permissionsRepository.grant(userId, productId, channel, permissionKey)
+    } catch (error) {
+        logger.error(error, ["Service", "yellow", "PERMISSION", "green"])
+        throw new DefaultError(500, "Please contact the maintainer")
+    }
+}
+
+async function revoke({ userId, productId, channel, permissionKey }) {
+    try {
+        const result = permissionsRepository.revoke(userId, productId, channel, permissionKey)
+        if (result.changes === 0) {
+            throw new DefaultError(404, "Permission not found or already revoked.")
+        }
+        return result
+    } catch (error) {
+        if (error instanceof DefaultError) throw error
+        logger.error(error, ["Service", "yellow", "PERMISSION", "green"])
+        throw new DefaultError(500, "Please contact the maintainer")
+    }
+}
+
+function findByUserAndProduct(userId, productId) {
+    try {
+        const permissions = permissionsRepository.findByUserAndProduct(userId, productId)
+        if (!permissions || permissions.length === 0) {
+            throw new DefaultError(404, "No permissions found for this user and product.")
+        }
+        return permissions
+    } catch (error) {
+        if (error instanceof DefaultError) throw error
+        logger.error(error, ["Service", "yellow", "PERMISSION", "green"])
+        throw new DefaultError(500, "Please contact the maintainer")
+    }
+}
+
+async function revokeAllOnProduct(userId, productId) {
+    try {
+        return permissionsRepository.revokeAllOnProduct(userId, productId)
+    } catch (error) {
+        logger.error(error, ["Service", "yellow", "PERMISSION", "green"])
+        throw new DefaultError(500, "Please contact the maintainer")
+    }
+}
+
+function checkPermission(userId, productName, channel, permission) {
+    try {
+        return permissionsRepository.hasPermission(userId, productName, channel, permission)
+    } catch (error) {
+        logger.error(error, ["Service", "yellow", "PERMISSION", "green"])
+        throw new DefaultError(500, "Please contact the maintainer")
+    }
+}
+
+module.exports = {
+    grant,
+    revoke,
+    checkPermission,
+    revokeAllOnProduct,
+    findByUserAndProduct
+}
\ No newline at end of file
diff --git a/services/register.js b/services/register.js
deleted file mode 100644
index 1b8b245..0000000
--- a/services/register.js
+++ /dev/null
@@ -1,19 +0,0 @@
-const crypto = require("node:crypto")
-const DefaultError = require("../errors/DefaultError")
-
-function register({ email, username }) {
-    const canRegister = true
-    if (canRegister === true) {
-        return {
-            id: crypto.randomUUID(),
-            username: username,
-            email: email
-        }
-    } else {
-        throw new DefaultError(418, "I'm a teapot", "", "TeaPotExeception")
-    }
-}
-
-module.exports = {
-    register
-}
\ No newline at end of file
diff --git a/services/userService.js b/services/userService.js
new file mode 100644
index 0000000..4d540ca
--- /dev/null
+++ b/services/userService.js
@@ -0,0 +1,66 @@
+const userRepository = require("../repositories/userRepository")
+const bcrypt = require("bcryptjs")
+const logger = require("../modules/logger")
+const { DefaultError } = require("../errors/errors")
+
+async function register({ firstName = null, lastName = null, username, password }) {
+    const isUserExists = userRepository.findByUsername(username)
+    if (isUserExists) {
+        throw new DefaultError(409, "Username taken.")
+    }
+    try {
+        const hashedPassword = await bcrypt.hash(password, 4)
+        return userRepository.register(firstName, lastName, username, hashedPassword)
+    } catch (error) {
+        logger.error(error, ["Service", "yellow", "USER", "green"])
+        throw new DefaultError(500, "Please contact the maintainer")
+    }
+}
+
+async function remove(id) {
+    const user = userRepository.findById(id)
+    if (!user) {
+        throw new DefaultError(404, "User not found.")
+    }
+    try {
+        return userRepository.remove(id)
+    } catch (error) {
+        logger.error(error, ["Service", "yellow", "USER", "green"])
+        throw new DefaultError(500, "Please contact the maintainer")
+    }
+}
+
+async function changePassword(id, newPassword) {
+    const user = userRepository.findById(id)
+    if (!user) {
+        throw new DefaultError(404, "User not found.")
+    }
+    try {
+        const hashedPassword = await bcrypt.hash(newPassword, 4)
+        return userRepository.changePassword(id, hashedPassword)
+    } catch (error) {
+        logger.error(error, ["Service", "yellow", "USER", "green"])
+        throw new DefaultError(500, "Please contact the maintainer")
+    }
+}
+
+function findById(id) {
+    try {
+        const user = userRepository.findById(id)
+        if (!user) {
+            throw new DefaultError(404, "User not found.")
+        }
+        return user
+    } catch (error) {
+        if (error instanceof DefaultError) throw error
+        logger.error(error, ["Service", "yellow", "USER", "green"])
+        throw new DefaultError(500, "Please contact the maintainer")
+    }
+}
+
+module.exports = {
+    remove,
+    findById,
+    register,
+    changePassword,
+}
\ No newline at end of file
diff --git a/test.js b/test.js
index 8b851d5..e69de29 100644
--- a/test.js
+++ b/test.js
@@ -1,3 +0,0 @@
-const dg = require("./modules/databaseGlobals")
-
-dg.initializeDatabase()
\ No newline at end of file