Some users are using a central login for their web services that allows their end users to seamless access many services without repeated logins. They would ideally like to integrate ThinLinc's Web Access in to this as well. The big standards in this area are SAML and OpenID Connect (OIDC). The former is older, more complex, but more widely deployed.
Nice DCV has some rudimentary support for this via a general mechanism where it's up to the users to actually integrate it to the specific systems/protocols: https://docs.aws.amazon.com/dcv/latest/adminguide/external-authentication.html
In some cases, the single sign-on is not just about user convenience, but also about delegating the responsibility of authentication. A site can then get rid of a lot of the burden of fulfilling all compliance requirements by having a central authority verify the users. They can then reduce their burden to just enforcing the access for that identity.
https://community.thinlinc.com/t/tl-web-access-through-basic-authentication/774
