Claims augmentation with OWIN but outside of Startup code

Claims list included in the ClaimsPrincipal¬†usually originate from the security token¬†received by the application as part of user authentication (SAML, OpenIDConnect id token) or access authorization (OAuth2 bearer access token). ¬†However, sometimes there is a need to modify that list with claims derived from other sources: Attributes retrieved from custom databases Attributes not initially included […]