// Create a new user with a known team ID user := &model.User{ Username: "john_doe", Email: "[email protected]", Password: "password123", TeamId: "team_123", } err := user.Create() if err != nil { log.Fatal("Failed to create user:", err) } // Get a user by ID and check their team ID user, err := model.GetUserById("user_456") if err != nil { log.Fatal("Failed to get user:", err) } if user.TeamId != "team_789" { log.Fatalf("User %s is not a member of team %s", user.Username, "team_789") }In these examples, we create a new user and set their TeamId, and then we get a user by ID and check their TeamId. These operations demonstrate how the User and TeamId fields are used in the Mattermost platform.