[PLT-7573] Make deactivated user not counted in Town Square member count (#7421)

* make deactivated user not counted in Town Square member count

* update app

app/user.go

@@ -917,6 +917,22 @@ func (a *App) UpdateActive(user *model.User, active bool) (*model.User, *model.A
 			a.SetStatusOffline(ruser.Id, false)
 		}
 
+		teamsForUser, err := a.GetTeamsForUser(user.Id)
+		if err != nil {
+			return nil, err
+		}
+
+		for _, team := range teamsForUser {
+			channelsForUser, err := a.GetChannelsForUser(team.Id, user.Id)
+			if err != nil {
+				return nil, err
+			}
+
+			for _, channel := range *channelsForUser {
+				a.InvalidateCacheForChannelMembers(channel.Id)
+			}
+		}
+
 		return ruser, nil
 	}
 }