tested and fixed

src/services/user.js

@@ -1,21 +1,20 @@
 import db from '../db.js'
 import customError from '../response/customError.js';
 import responseCodes from '../response/responseCodes.js';
-import statuses from '../utils/status.js';
 import bcrypt from 'bcrypt';
+import errorHandler from '../utils/pgerrorhandler.js';
 
 class UserService {
     async create(username, password) {
         await db.query("INSERT INTO users (username, password) VALUES ($1, $2)", [username, bcrypt.hashSync(password, 12)]).catch((e) => {
             errorHandler(e, "user");
         })
-        return statuses.ok;
     }
 
     async getByUsername(username) {
-        let user = (await db.query("SELECT * FROM Users WHERE username = $1", [username])).rows;
-        if (user == undefined) throw new customError(`getByUsername user not found`, responseCodes.responses.usernames.not_found);
-        return (user[0]);
+        let user = (await db.query("SELECT * FROM Users WHERE username = $1", [username]));
+        if (user.rowCount == 0) throw new customError(`getByUsername user not found`, responseCodes.responses.usernames.not_found);
+        return user.rows[0];
     }
 
     async getAll() {
@@ -31,7 +30,6 @@ class UserService {
     async joinGroup(userId, groupId) {
         if (await (this.isInGroup(userId, groupId))) throw new customError(`joinGroup user already in group`, responseCodes.responses.user.already_in_group);
         await db.query("UPDATE Users SET groups = array_append(groups, $1::integer) WHERE ID = $2", [groupId, userId]);
-        return statuses.ok;
     }
 }