Specify TM User ID for automated TM update

Hi,

is there any API method to set up a custom TM User ID to be used during the "Update main TMs" automatic task? I know that this possible through the UI, but I have not found any way to do this in the API. This settings seems to be not project specific, since the same settings is used in all projects.

This is a standalone application, not a plugin, and ideally I should be able to use a different TM User ID for the different projects I process with this application.

Thanks,

Tamas