protected function authenticate()
    {
        if (empty($this->guards) && Auth::check()) {
            return;
        }

        foreach ($this->guards as $guard) {
            if (Auth::guard($guard)->check()) {
                Auth::shouldUse($guard);
                return;
            }
        }

        throw new AuthenticationException('Unauthenticated.', $this->guards);
    }
protected function authenticate()
    {
        if (empty($this->guards) && Auth::check()) {
            return;
        }

        foreach ($this->guards as $guard) {
            if (Auth::guard($guard)->check()) {
                Auth::shouldUse($guard);
                return;
            }
        }

        throw new AuthenticationException('Unauthenticated.', $this->guards);
    }
protected function authenticate ( ) { if ( empty ( $ this -> guards ) && Auth :: check ( ) ) { return ; } foreach ( $ this -> guards as $ guard ) { if ( Auth :: guard ( $ guard ) -> check ( ) ) { Auth :: shouldUse ( $ guard ) ; return ; } } throw new AuthenticationException ( 'Unauthenticated.' , $ this -> guards ) ; }
Determine if the user is logged in.

@return void
@throws AuthenticationException
Determine if the user is logged in .