Subscribe to new updates

[jaydipdeveloper]

I have a project in that we have page called community when all user can post so I need to subscribe to get updates

let userFeed = Client.shared.flatFeed(feedSlug: "community", userId: community_id_here)

userFeed.subscribe(typeOf: GetStreamActivity.self, subscription: { result in
switch result {
case .success(let activities):
// Handle received activities
print("Received activities: (activities)")
case .failure(let error):
// Handle subscription error
print("Failed to subscribe: (error)")
}
})

        This never print  Received activities or Failed to subscribe
        
        Please help me

[jaydipdeveloper]

let userFeed = Client.shared.flatFeed(feedSlug: "user", userId: celebrity.memberId.uuidString.lowercased())
userFeed.callbackQueue = .main
userFeed.subscribe(typeOf: Activity.self) { result in
switch result {
case .success(let activities):
// Handle received activities
print("Received activities: (activities)")
case .failure(let error):
// Handle subscription error
print("Failed to subscribe: (error)")
}
}

    still not working