I have no problem sending push notifications using Quickblox Messages module, but when I try to send an in-app alert, I get this error:
"No recipients. At least one user should be subscribed for In-app alert (through SDK or REST API)"
I was expecting that any user registered for push notifications would be able to receive in-app notifications but I'm guessing that's not the case. I went through QB documentation but can't find the code to subscribe a user to in-app alerts. What is the correct way to do it?