Missing await keyword in user.model.js

At line 73 in `user.model.js`, below function is written:

```javascript
userSchema.methods.isPasswordMatch = async function (password) {
const user = this;
return bcrypt.compare(password, user.password);
};
```

I believe there is a missing await keyword in return statement as the compare function is an async function. If bcrypt.compare doesn't return promise, then async is redundant.

So the final code should be
```javascript
userSchema.methods.isPasswordMatch = async function (password) {
const user = this;
return await bcrypt.compare(password, user.password);
};
```

Open user.model.js at line 73 and verify bcrypt.compare's documented return behavior and the surrounding user-model usage. Confirm whether the async handling needs adjustment, then run the relevant project tests; done means the password-match method follows the library contract without changing its expected result.

Written by the indexing model from the issue text.