✅ Splitting return type into a seperate location

    [EndpointName(nameof(UpdateUser))]
    [EndpointSummary("Update an existing user")]
    [EndpointDescription("Updates the details of an existing user. The user ID in the URL")]
    public async Task<
        Results<
            Ok<UserDto>,
            NotFound, 
            BadRequest
        >> UpdateUser(ISender sender, int id, UpdateUserCommand command)
    {
        if (id != command.Id)
        {
            return TypedResults.BadRequest();
        }
    
        var user = await sender.Send(command);

        return TypedResults.Ok(user);
    }