protected function register(Request $request)
{
    $input = $request->all();
    $validator = $this->validator($input);
    $tutor = Role::where('name','tutor')->first();

    if ($validator->passes()) {

        $data = $this->create($input)->toArray();
        $data['token'] = str_random(25);
        $user = User::find($data['id']);
        $user->token = $data['token'];
        $user->save();


            Mail::send('mails.confirmation', $data, function ($message) use($data){
            $message->to($data['email']);
            $message->subject('Registration Confirmation');
        });
        return redirect(route('login'))->with('status', 'Se ha enviado el correo electrónico de confirmación. Por favor, revise su bandeja de entrada.');
    }
    return redirect(route('login'))->with('status', $validator->errors());
}

Swift_TransportException in AbstractSmtpTransport.php line 383:
Expected response code 250 but got code "530", with message "530-5.5.1
Authentication Required. Learn more at
530 5.5.1 https://support.google.com/mail/?p=WantAuthError
t22sm5492950qke.49 - gsmtp"

return [

'driver' => env('MAIL_DRIVER', 'smtp'),
'host' => env('MAIL_HOST', 'smtp.gmail.com'),
'port' => env('MAIL_PORT', 587),
'from' => [
    'address' => env('MAIL_FROM_ADDRESS', 'mi_email@gmail.com'),
    'name' => env('MAIL_FROM_NAME', 'Discapp'),
],
'encryption' => env('MAIL_ENCRYPTION', 'tls'),
'username' => env('MAIL_USERNAME'),
'password' => env('MAIL_PASSWORD'),
'sendmail' => '/usr/sbin/sendmail -bs',
'markdown' => [
    'theme' => 'default',

    'paths' => [
        resource_path('views/vendor/mail'),
    ],
],
];

MAIL_DRIVER=smtp
MAIL_HOST=smtp.gmail.com
MAIL_PORT=587
MAIL_USERNAME=discapp1991@gmail.com
MAIL_PASSWORD=dmxsxcrowuaadkco
MAIL_ENCRYPTION=tls