Sanitize user in update user response (#24362)

server/channels/app/user.go

@@ -1285,6 +1285,8 @@ func (a *App) UpdateUser(c request.CTX, user *model.User, sendNotifications bool
 		}(user.Id)
 	}
 
+	newUser.Sanitize(map[string]bool{})
+
 	return newUser, nil
 }