I want to use Firebase Cloud Messaging (FCM) in my Laravel app. I should add the FCM server_key and sender_id to my .env file, but there are multiple server keys in my FCM settings :
Also there is the current api key in google-services.json file and web API key in general settings.
I tried using all of them, but every time I get this error :
I also tried writing the server key and sender id between " " in .env file but it doesn't work.
How can I fix it ??