What you're asking for sounds like a product feature, not APS/Forge API specific.

If you want to integrate your enterprise/company's identity server with the Autodesk platform & software to implement Single Sign On for your users, please check this manual, and you will need a subscription plan to use this feature.

https://help.autodesk.com/view/SSOGUIDE/ENU/?guid=SSOGUIDE_Okta_Guide_About_Single_Sign_on_SSO_html

As it's not an API inquiry, so for future help, please reach out to our product help team instead: https://www.autodesk.com/support