Migrating Code Collaborator To SAML Authenticaiton

I'm working with an existing Code Collaborator installation that has years' worth of code review records and their associated users.  For security and to unify the service login procedures among several applications we use, I would like to use the SAML authentication feature of Code Collaborator.  I read through the SAML single sign on documentation Smartbear provides, but I have not found any information on how adding SSO impacts existing user accounts.

Does anyone have experience migrating an existing Collaborator userbase to SSO?  Is there any documented steps on how I would need to perform such a migration and ensure SSO users link to their old accounts?