app/Http/Controllers/Auth/AuthController.php
public function getLogout(Request $request)
    {
        $request->session()->flush();

        Auth::logout();

        return redirect(property_exists($this, 'redirectAfterLogout') ? $this->redirectAfterLogout : '/');
    }
public function getLogout(Request $request)
    {
        $request->session()->flush();

        Auth::logout();

        return redirect(property_exists($this, 'redirectAfterLogout') ? $this->redirectAfterLogout : '/');
    }
Log the user out of the application.

@param  \Illuminate\Http\Request  $request
@return \Illuminate\Http\Response