Recover password mail dosen't send to user laravel

the password recovery email in laravel is not sent to the user and this is my function in controller :

public function recover(Request $request)
{
    $validator = Validator::make($request->only('email'), [
        'email' => 'required'
    ]);

    if($validator->fails()) {
        throw new ValidationHttpException($validator->errors()->all());
    }

    $response = Password::sendResetLink($request->only('email'), function (Message $message) {
        $message->subject(Config::get('boilerplate.recovery_email_subject'));
    });

    switch ($response) {
        case Password::RESET_LINK_SENT:
          //  return $this->response->noContent();
            return response()->json(['success' => true, 'data' => $response], 200);
        case Password::INVALID_USER:
        //    return $this->response->errorNotFound();
            return response()->json(['success' => false, 'data' => $response], 200);

    }
}

and I configure my .env and mail.php I use laravel 5.6

via Chebli Mohamed