Call apiService in viewDidAppear (#825)

Mastodon/Scene/Profile/Header/ProfileHeaderViewController.swift

@@ -183,6 +183,32 @@ extension ProfileHeaderViewController {
         
         // set display after view appear
         profileHeaderView.setupImageOverlayViews()
+        
+        guard let userID = viewModel.user?.id else { return }
+        Task {
+            do {
+                let response = try await viewModel.context.apiService.followers(
+                    userID: userID,
+                    maxID: nil,
+                    authenticationBox: viewModel.authContext.mastodonAuthenticationBox
+                )
+                
+                profileHeaderView.viewModel.followersCount = response.value.count
+            } catch {
+                logger.log(level: .debug, "\((#file as NSString).lastPathComponent, privacy: .public)[\(#line, privacy: .public)], \(#function, privacy: .public): fetch follower fail: \(error.localizedDescription)")
+            }
+            do {
+                let response = try await viewModel.context.apiService.following(
+                    userID: userID,
+                    maxID: nil,
+                    authenticationBox: viewModel.authContext.mastodonAuthenticationBox
+                )
+                
+                profileHeaderView.viewModel.followingCount = response.value.count
+            } catch {
+                logger.log(level: .debug, "\((#file as NSString).lastPathComponent, privacy: .public)[\(#line, privacy: .public)], \(#function, privacy: .public): fetch following fail: \(error.localizedDescription)")
+            }
+        }   // end Task
     }
     
     override func viewDidLayoutSubviews() {