CODE EXAMPLE FOR PHP

authenticate user with phone laravel

It sounds like you wont be using much of the default AuthController for this as that will expect some form of username/password combo.

You can however use the Auth facade by doing whatever authentication checks you want and then calling the login() method like so:

// identify your user with your credentials (OTP)
$user= User::where('password', $password)->get();

// If you have a user, authenticate them
if ($user) {
    // Authenticate the user
    Auth::login($user);
}
This is very bare bones but you can read more here (https://laravel.com/docs/5.8/authentication#other-authentication-methods)