There is no need to pre-provision federated users.
When a federated user signs in to Skeddly for the first time, a Skeddly "user" is automatically allocated for him.
You will not see that user in your users list in the Managed Users page.
The user's federated username will be displayed as required in places such as "Last Modified By" to indicate that the user modified actions, credentials, etc.
The allocated user cannot sign-in using the normal Skeddly sign-in page.