It's more of an invisible feature than a protocol.
The signup protocol and user flow is the same if the feature is supported or not. You just skip a step if the convenience feature is supported.
With SSO the user is inconvenienced with an additional option at sign up and login, and there's the risk of duplicate accounts. Also stronger vendor lock in.
The signup protocol and user flow is the same if the feature is supported or not. You just skip a step if the convenience feature is supported.
With SSO the user is inconvenienced with an additional option at sign up and login, and there's the risk of duplicate accounts. Also stronger vendor lock in.