Is there a way to send FCM push notification to all the email address i have in my local database - ionic-framework

Question

Well I'm setting up a database where user details would be stored using ionic as front end and lumen to make API calls. My concern is that can i send a push notification to all the people who are using my application using the email information that is in my database. Is it possible
Following is the code that i am trying to do :
public function send_notification_all(Request $request){
$this->validate($request, [
'title' => 'required|max:30|min:20',
'message' => 'required'
]);
$noti_title = $request->input('title');
$noti_body = $request->input('message');
$optionBuilder = new OptionsBuilder();
$optionBuilder->setTimeToLive(60*20);
$notificationBuilder = new PayloadNotificationBuilder($noti_title);
$notificationBuilder->setBody($noti_body)
->setSound('default');
$dataBuilder = new PayloadDataBuilder();
$dataBuilder->addData(['a_data' => 'my_data']);
$option = $optionBuilder->build();
$notification = $notificationBuilder->build();
$data = $dataBuilder->build();
$email = User::pluck('email')->toArray();
$downstreamResponse = FCM::sendTo($email, $option, $notification, $data);
$downstreamResponse->numberSuccess();
$downstreamResponse->numberFailure();
$downstreamResponse->numberModification();
if($downstreamResponse->numberSuccess() == 0 ){
return $this->errorResponse("unable to send notificaton to all",401);
}else {
return $this->successResponse(['msg' => 'message send successfully','successfull' => $downstreamResponse->numberSuccess(),'failures' => $downstreamResponse->numberFailure()]);
}
}
Just need the opinion that is it possible to do it in this way and do let me know if there is any mistake or the changes that i have to make in my code. Waiting for the Positive response and Guidance

Answer 1

You can't send notifications using their email addresses.
You should save in your Database the fcm_token of every user who registers. I suggest using the following package and reading the docs in it: Laravel-FCM
You should also take care of refreshing the token if the device request so.