public function login(AuthenticationRequest $request)
    {
        // Prepare variables
        $loginField = get_login_field($request->input($this->username()));
        $credentials = [
            'is_active' => true,
            $loginField => $request->input('loginfield'),
            'password' => $request->input('password'),
        ];

        // If the class is using the ThrottlesLogins trait, we can automatically throttle
        // the login attempts for this application. We'll key this by the username and
        // the IP address of the client making these requests into this application.
        if ($this->hasTooManyLoginAttempts($request)) {
            $this->fireLockoutEvent($request);

            return $this->sendLockoutResponse($request);
        }

        if (auth()->guard($this->getGuard())->attempt($credentials, $request->filled('remember'))) {
            return $this->sendLoginResponse($request);
        }

        // If the login attempt was unsuccessful we will increment the number of attempts
        // to login and redirect the user back to the login form. Of course, when this
        // user surpasses their maximum number of attempts they will get locked out.
        $this->incrementLoginAttempts($request);

        return $this->sendFailedLoginResponse($request);
    }