snipe-it/app/Http/Controllers/Auth/ForgotPasswordController.php

<?php

namespace App\Http\Controllers\Auth;

use App\Http\Controllers\Controller;
use Illuminate\Foundation\Auth\SendsPasswordResetEmails;
use Illuminate\Http\Request;
use App\Models\User;

class ForgotPasswordController extends Controller
{
    /*
    |--------------------------------------------------------------------------
    | Password Reset Controller
    |--------------------------------------------------------------------------
    |
    | This controller is responsible for handling password reset emails and
    | includes a trait which assists in sending these notifications from
    | your application to your users. Feel free to explore this trait.
    |
    */

    use SendsPasswordResetEmails;

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

    /**
     * Get the e-mail subject line to be used for the reset link email.
     * Overriding method "getEmailSubject()" from trait "use ResetsPasswords"
     * @return string
     */
    public function getEmailSubject()
    {
        return property_exists($this, 'subject') ? $this->subject : \Lang::get('mail.reset_link');
    }

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

        if ($valid_user->count() == 0 ) {
            return back()->withErrors('error','This email address does not exist, or is not activated.');
        }


        // We will send the password reset link to this user. Once we have attempted
        // to send the link, we will examine the response then see the message we
        // need to show to the user. Finally, we'll send out a proper response.
        $response = $this->broker()->sendResetLink(
            $request->only('email')
        );

        if ($response === \Password::RESET_LINK_SENT) {
            return redirect()->route('login')->with('status', trans($response));
        }

        // If an error was returned by the password broker, we will get this message
        // translated so we can notify a user of the problem. We'll redirect back
        // to where the users came from so they can attempt this process again.
        return back()->withErrors(
            ['email' => trans($response)]
        );
    }
}