Reuse logon token from RESTful API in Web Intelligence report

Hi,

we use a portal application to link to reports using opendoc links. Beforehand we create logon tokens using the RESTful webservices and user specific credentials and parse them into the opendoc links.

Now we have some reports linked which itself contain opendoc links as drill through.

When we now use these links, we're asked for credentials, as the token is only valid for that call and doesn't transfer.

How can this be solved other than using the SDKs? Is it possible at all to log someone in using the RESTful webservices and use web intelligence and the drill through properly?

Thanks for your help,

Markus