Hi,
I'm a bit lost with notifications.
I'm looking to make notifications per devices and I'm testing on Android.
I did a web api who is registering the device using his device id as tags and the firebase token using FCM as registrationId in the xml body.
I have a 200 code response but when I'm testing to send notification for all devices on my azure portal I have this error : The Push Notification System handle for the registration is invalid
It seems that my the registration is not well done but I don't know what I did wrong.
I checked all of my configuration but everything is well set.
Do you have any solution for me ?
Thank you