How to normalize the input email?

Question

I was working with express-validator when i encountered that i used normalize email for validation of email while signing up so i stored the normalized email to server.

Validation code:

router.post(
  "/signup",
  [
    check("name").not().isEmpty(),
    check("email").normalizeEmail().isEmail(),
    check("password").isLength({ min: 6, max: 15 }),
  ],
  userController.signupUser
);

Input email: [email protected]

normalized email: [email protected] (storing in db)

Now the problem is when working on login the input email doesn't matches and shows invalid credentials.

Answer 1

After researching and observing I noticed that the code which was used at the time of signing up can be used to normalize email at the time of login, I just had to add:

 router.post("/login",[check('email').normalizeEmail()], userController.loginUser);

After adding the email was converting to normalized one and can be used directly from requests.