SOAP - Contact Insert (set_entry)

Hi

I’ve noticed that all the contacts created via an external form using SOAP API have a user name of “.” (full stop).

I would have expected this to be the name of the user that the SOAP call uses to login, like when any other user creates a contact.

Does anyone know how I can make the set_entry call use the logged in user used by the SOAP API?

Many Thanks

Luke