Register Controller Created and Tested

daily-thought-user-service/server/controllers/appController.js

+import UserModel from '../model/User.model.js';
+import bcrypt from 'bcrypt';
+
 /** POST: http://localhost:8080/api/register
  * @param : {
   "username" : "example123",
@@ -7,7 +10,61 @@
 }
 */
 export async function register(req,res){
-    res.json('register route')
+
+  try {
+      const { username, password, profile, email } = req.body;        
+
+      // Checking existing Username
+      const existUsername = new Promise((resolve, reject) => {
+          UserModel.findOne({ username }, function(err, user){
+              if(err) reject(new Error(err))
+              if(user) reject({ error : "Please use unique username"});
+
+              resolve();
+          })
+      });
+
+      // Checking existing Email
+      const existEmail = new Promise((resolve, reject) => {
+          UserModel.findOne({ email }, function(err, email){
+              if(err) reject(new Error(err))
+              if(email) reject({ error : "Please use unique Email"});
+
+              resolve();
+          })
+      });
+
+
+      Promise.all([existUsername, existEmail])
+          .then(() => {
+              if(password){
+                  bcrypt.hash(password, 10)
+                      .then( hashedPassword => {
+                          
+                          const user = new UserModel({
+                              username,
+                              password: hashedPassword,
+                              profile: profile || '',
+                              email
+                          });
+
+                          // return save result as a response
+                          user.save()
+                              .then(result => res.status(201).send({ msg: "User Registered Successfully"}))
+                              .catch(error => res.status(500).send({error}))
+
+                      }).catch(error => {
+                          return res.status(500).send({
+                              error : "Enable to hashed password"
+                          })
+                      })
+              }
+          }).catch(error => {
+              return res.status(500).send({ error })
+          })
+  } catch (error) {
+      return res.status(500).send(error);
+  }
 }
 
 /** POST: http://localhost:8080/api/login 

daily-thought-user-service/server/package.json

@@ -11,6 +11,7 @@
   "author": "",
   "license": "ISC",
   "dependencies": {
+    "bcrypt": "^5.1.0",
     "cors": "^2.8.5",
     "express": "^4.18.2",
     "mongodb-memory-server": "^8.10.2",