Atlas AutoComplete - How to send xx parameters

[Chris]

I installed and tested the AutoComplete components and it works ok, but then
I realized that this tool is useless if you cannot pass more than the 1
parameter.

For example, if you have a user logged in who is typing in the text field,
you cannot query and return values based on the UserLoginName.

Is there any way to pass more than 1 parameter to your web service?
I just want to pass a UserID [int] to help the webservice return
personalized results.

Thanks.