Redirection headers is visible instead hidden in Laravel

Question

I use Laravel 8 (the last version), and I want redirect users to Twitter to log them.

I realized that there was this display also on previous versions of Laravel.

I use this line code:

return redirect()->away($url);
// or
return redirect($url);

Why, when I use this lines code to login user with Twitter, I've this display on page between login page and Twitter login page ?

My login method in controller

use Abraham\TwitterOAuth\TwitterOAuth;

public function login(Request $request): string
{
    $connection = new TwitterOAuth(
        config('services.twitter.client_id'),
        config('services.twitter.client_secret')
    );

    $requestToken = $connection->oauth('oauth/request_token', [
        'oauth_callback' => config('services.twitter.redirect'),
    ]);

    $request->session()->put('oauth_token', $requestToken['oauth_token']);
    $request->session()->put('oauth_token_secret', $requestToken['oauth_token_secret']);

    $url = $connection->url('oauth/authorize', [
        'oauth_token' => $requestToken['oauth_token'],
    ]);

    return redirect()->away($url);
}

The redirection is visible, and ugly.

Answer 1

Incorrect return value is declared for your login function, you should change return type string to RedirectResponse (Alternative, you can remove type declarations altogether)

public function login(Request $request): string

to:

public function login(Request $request): \Illuminate\Http\RedirectResponse