why are you redirecting me to login using different wards in Laravel 5.6

In my configuration file I created 4 guards for a login where 4 models will participate

I modified the LoginController so that it works with different guards, but so entering the correct values always redirects me to the login, the methods that I overwrote in my LoginController was

/**
     * Handle a login request to the application.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return \Illuminate\Http\RedirectResponse|\Illuminate\Http\Response|\Illuminate\Http\JsonResponse
     *
     * @throws \Illuminate\Validation\ValidationException
     */
    public function login(Request $request)
    {
        $this->validateLogin($request);

        // 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 ($this->attemptLogin($request)) {
            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);
    }

    /**
     * Validate the user login request.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return void
     */
    protected function validateLogin(Request $request)
    {
        $this->validate($request, [
            'rol' => 'required|exists:roles,name',
            $this->username() => 'required|string',
            'password' => 'required|string',
        ]);
    }

     /**
     * Attempt to log the user into the application.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return bool
     */
    protected function attemptLogin(Request $request)
    {
        return $this->guard($request->rol)->attempt(
            $this->credentials($request), $request->filled('remember')
        );
    }


    /**
     * Get the guard to be used during authentication.
     *
     * @return \Illuminate\Contracts\Auth\StatefulGuard
     */
    protected function guard($nameGuard)
    {
        return Auth::guard($nameGuard.'s');
    }

     /**
     * Send the response after the user was authenticated.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return \Illuminate\Http\Response
     */
    protected function sendLoginResponse(Request $request)
    {
        $request->session()->regenerate();
        $this->clearLoginAttempts($request);
        config(['auth.defaults.guard' => $request->rol.'s']);
        return $this->authenticated($request, $this->guard($request->rol)->user())
                ?: redirect()->intended($this->redirectPath());
    }

in the request I send the role that from this name I assign the corresponding guard, if the role is admin the guard is admins.

What other changes should I make to make the login work, when trying to access auth()->user(); I do not receive anything, but if I type auth('admins)->user(); it returns me correctly

my routes

Route::group(['prefix' => 'admin', 'middleware' => ['auth:'.config('auth.defaults.guard')],
    'namespace' => 'Admin', 'as' => 'admin.'], function () {
   /***/
});

via Chebli Mohamed