Add test cases for Authorization

[DavianYang]

Auth routes

/api/v1/users/register

• POST: / should register user if required given data is provided
• POST: / should return 400 error if given email is invalid
• POST: / should return 400 error if given email is already used
• POST: / should return 400 error if password length is less than 8 characters
• POST: / should return 400 error if given password doesn’t contain both letters and characters

/api/v1/users/login

• POST: / should login user if email and password match
• POST: / should return 401 error if there is no user with given email
• POST: / should return 401 error if given password is incorrect

/api/v1/users/logout

• POST: / should return 204 status if refresh token is valid

/api/v1/users/forgotPassword

• POST: / should return 204 and send reset token email to user
• POST: / should send 400 if user didn't provide email
• POST: / should send 404 if email doesn't belong to any of users

/api/v1/users/resetPassword

• POST: / should return 204 and reset the password
• POST: / should return 401 if reset token is missing
• POST: / should return 400 if token is expired or user is not found

/api/v1/users/updateMyPassword