How to use Laravel Passport with a custom username column

You can use findForPassport method in your user model.

This method take username as argument, and return user model

For example:

class User extends Authenticatable
{
    use HasApiTokens, Notifiable;

    // ... some code

    public function findForPassport($username) {
        return $this->where('id', $username)->first();
    }
}