Guard.php

<?php

namespace App\Firebase;

use App\Models\User\User;
use Exception;
use Firebase\Auth\Token\Verifier;

class Guard
{
    protected $verifier;

    /**
     * Guard constructor.
     * @param Verifier $verifier
     */
    public function __construct(Verifier $verifier)
    {
        $this->verifier = $verifier;
    }

    /**
     * @param $request
     * @return User|null
     * @throws Exception
     */
    public function user($request): ?User
    {
        $token = $request->bearerToken();

        try {
            $firebaseToken = $this->verifier->verifyIdToken($token);

            return app(config('auth.providers.users.model'))
                ->setFirebaseAuthenticationToken($token)
                ->resolveByClaims($firebaseToken->claims());
        } catch (Exception $e) {
            if (config('app.debug')) {
                throw $e;
            }

            return null;
        }
    }
}