Fix route path and UUID formatting in session service

Changed route definitions in index.js from "" to "/" for correct routing. Updated sessionsService.js to add dashes to UUID before querying user data, ensuring proper UUID formatting.

routes/index.js

@@ -4,14 +4,14 @@ const utils = require("../modules/utils")
 const serverService = require("../services/serverService")
 
 if (utils.isTrueFromDotEnv("SUPPORT_AUTHLIB_INJECTOR")) {
-    router.get("", (req, res) => {
+    router.get("/", (req, res) => {
         const hostname = req.hostname
         const metadata = serverService.getServerMetadata(hostname)
         res.header("X-Authlib-Injector-Date", new Date().toISOString())
         return res.status(200).json(metadata)
     })
 } else {
-    router.get("", (req, res, next) => next())
+    router.get("/", (req, res, next) => next())
 }
 
 module.exports = router