OIDC standardadized Initiating Login from a Third Party: https://openid.net/specs/openid-connect-core-1_0.html#ThirdPartyInitiatedLogin https://openid.net/specs

OIDC standardadized Initiating Login from a Third Party: https://openid.net/specs/openid-connect-core-1_0.html#ThirdPartyInitiatedLogin https://openid.net/specs/openid-connect-core-1_0.html#ThirdP... It works very differently, but it will get the job done in a much safer way.