Single sign-on
OAuth or OpenID Connect should not be confused with SSO because users still need to enter login credentials each time they access different sites or applications
SSO Implementations
Single Sign-On | HashiCorp Cloud Platform
Search Cloud documentation HashiCorp Cloud Platform (HCP) allows organizations to configure SAML 2.0 SSO (Single Sign-On) as an alternative to traditional user management with GitHub and email-based options. This can help mitigate Account Take Over (ATO) attacks, provide a universal source of truth to federate identities from your identity provider (IDP), and better manage user access to your organization.
https://cloud.hashicorp.com/docs/hcp/sso

An unpopular perspective on the SSO tax | SSOReady
An admittedly wandering defense of the most unpopular pricing practice in SaaS
https://ssoready.com/blog/from-the-founders/an-unpopular-perspective-on-the-sso-tax/

Seonglae Cho