Please Note: Use at your own risk.
Sample Apex class implementing the Auth.SamlJitHandler interface for a SAML just-in-time (JIT) provisioning
to occur based on data in the SAML assertion. The class will handle both creating and updating users based on
the data in the assertion. The class also maintains the permisssion set group assignments for the user based on
assertion data.
The PSG_DELETE_WHITE_LIST list in the class is used to ensure the class only deletes permission set group
assignments we have whitelisted i.e. not permission set groups assigned manually in the org.