Email minimum character count requirement

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1

Hi, I’m working on implementing some client requirements for login credentials.

Is there a way to enforce a minimum of four characters in the attached email field?

I know this request is a bit silly, I’m not sure if you can even have an email that is less then four characters. Doing due diligence and asking though!!

Screen Shot 2020-11-04 at 10.24.07 AM|572x500

2

Hey there!

Yep it’s a bit weird and kinda impossible :smiley: (to have such short email) but let me check and get back to you soon!

3

Hi,

I believe you can enforce this check using a rule. Verify the input fields in rule and validate according to your requirement and let the flow complete or raise error as per requirement.

4

@rashid779939 can you actually share an exact code snippet how you would do it?

5

Hm, I was under the impression that rules only run after a successful login attempt. So could you use them to validate an input field like that?

Also I’m a little unsure if rules are run for the user creation form in the original post.

6

Yep that is correct. Rules are run upon successful login attempt.

7

Yeah that’s true, but Auth0 provides a extensive handy features like you can also use per-registration hook to validate the input fields from user.

2 Likes
8

You can find more information about it here:

2 Likes
9

Thanks for the pointers. Here’s what I ended up with. If you happen to take a look let me know if you notice any glaring issues, this is my first one of these hooks.

module.exports = function (user, context, cb) {
  const response = {};

  // Deny the user's registration and send a localized message to New Universal Login
  if (user.email.length < 4) {
 const LOCALIZED_MESSAGES = {
   en: 'Email must be atleast four characters long.',
   es: 'El correo electrónico debe tener al menos cuatro caracteres.'
 };

 const localizedMessage = LOCALIZED_MESSAGES[context.renderLanguage] || LOCALIZED_MESSAGES['en'];
 return cb(new PreUserRegistrationError('Denied user registration in Pre User Registration Hook', localizedMessage));
  }

  cb(null, response);
};
10

Thanks for sharing it! Looks totally fine!

11

Actually, testing this code above did work in the hooks code editor however now when I try and create a new user I get the following error on the user create form after attempting to submit.

Error! Sandbox Error: Extensibility error

If I disable the pre-registration hook then the above error goes away.