Can anyone use SSO?
If you have a Google, Microsoft or Apple verified email address, you can use SSO.
What happens if an earner with an existing Credly account tries to sign in through SSO?
Existing users can sign in via one of the SSO options if the email matches the address on an existing Credly account. If it does not match, you will be creating an independent account.
If I have a personal gmail address and I add it as a secondary to my work email, can I use the SSO feature to sign-in?