BookStack/app/Http/Controllers/Auth/PasswordController.php

<?php

namespace BookStack\Http\Controllers\Auth;

use BookStack\Http\Controllers\Controller;
use Illuminate\Foundation\Auth\ResetsPasswords;
use Illuminate\Http\Request;
use Password;

class PasswordController extends Controller
{
    /*
    |--------------------------------------------------------------------------
    | Password Reset Controller
    |--------------------------------------------------------------------------
    |
    | This controller is responsible for handling password reset requests
    | and uses a simple trait to include this behavior. You're free to
    | explore this trait and override any methods you wish to tweak.
    |
    */

    use ResetsPasswords;

    protected $redirectTo = '/';

    /**
     * Create a new password controller instance.
     */
    public function __construct()
    {
        $this->middleware('guest');
    }


    /**
     * Send a reset link to the given user.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return \Illuminate\Http\Response
     */
    public function sendResetLinkEmail(Request $request)
    {
        $this->validate($request, ['email' => 'required|email']);

        $broker = $this->getBroker();

        $response = Password::broker($broker)->sendResetLink(
            $request->only('email'), $this->resetEmailBuilder()
        );

        switch ($response) {
            case Password::RESET_LINK_SENT:
                $message = 'A password reset link has been sent to ' . $request->get('email') . '.';
                session()->flash('success', $message);
                return $this->getSendResetLinkEmailSuccessResponse($response);

            case Password::INVALID_USER:
            default:
                return $this->getSendResetLinkEmailFailureResponse($response);
        }
    }

    /**
     * Get the response for after a successful password reset.
     *
     * @param  string  $response
     * @return \Symfony\Component\HttpFoundation\Response
     */
    protected function getResetSuccessResponse($response)
    {
        $message = 'Your password has been successfully reset.';
        session()->flash('success', $message);
        return redirect($this->redirectPath())->with('status', trans($response));
    }
}