For more information on User Management, please refer to the Professional User Guide and this SIG workshop recording .
Next Quick Start article: How do I know if I have access to a Cloud Instance?
See link below for details on unassigned licenses
https://communities.bentley.com/communities/other_communities/licensing_cloud_and_web_services/w/wiki/44008/practitioner-licensing#what-happens-if-left-unassigned
To assign a Practitioner license, please see the link below
https://communities.bentley.com/communities/other_communities/licensing_cloud_and_web_services/w/wiki/44008/practitioner-licensing#how-do-i-assign