Drupal 7 site recently migrated from Drupal 6. Using OpenID connect module. All users login with Google, using a Google account with a company domain name. (firstname.lastname@example.org). All users that were migrated can still log in. When a new user is created, he or she cannot log in, and the OpenID Identities tab for the new user is blank. The new user is directed back to the login page. The site is also using the Require Login module, which states that it works with OpenID.
How can I get Drupal to save the OpenID Identity to the user's account? So far my only idea is to give the user a one-time link so he can log in, then ask him to add the https://www.google.com/accounts/o8/id code into the "add identities" field.
Would that even work, since it's not actually google.com for the others? All the working users have IDs that state the company name (www.company.com/id=longstring).
How can I check to see if the site is using the new OpenID protocol and won't stop working on April 20th?
I am having trouble understanding how OpenId works with Drupal.