improve comments and add tenantId description
@@ -877,7 +877,7 @@ public class UserSessionStore {
* Returns the user id of the federated user.
*
* @param subjectIdentifier - Subject Identifier of the federated user.
- * @param tenantId - Id of the tenant domain.
+ * @param tenantId - Id of the service provider's tenant domain.
* @param idPId - Id of the identity provider.
* @return userId - User Id of the federated user.
* @throws UserSessionException
