How to add custom validation handler to user login form in Drupal 9 | Drupal 10 | Drupal 8

[@elvinxhimitiku5971]

Thank you very much. The process is very well explained and easy to follow 🙏

[@alan1996colo]

Gracias crack, me sirvio muchisimo más que la documentacion jeje, greetings from Argentina!

[@drupal-academy]

De nada. Estoy feliz, te ayuda.

[@HelmaMa-il8xq]

Hello How to check the username in the login form, if there is no such username, you will be redirected to the register form

[@drupal-academy]

In the validate function you can check if user exist or not by passing username to user_load_by_name($username). It will return false if username doesn't exist. Then you can redirect user to registeraton form

[@HelmaMa-il8xq]

@@drupal-academy thank you