Automatic run for a report in cases of successful SingleSignOn-Login

ARIS can create new users by SingleSignOn (via SAML or oAuth). And the new user can automatically be assigned to an existing usergroup. But we have cases that the new user needs some assignments to other usergroups depending of some customer user attributes delivered via SAML/oAuth within the login. So we want to create a report script to manage this. For this solution we need an option for an automated start of a report script with the login user as context on every successful user login via SSO (SAML/oAuth)