Are you trying used a combined Federated Repository and LDAP, or just LDAP, for user authentication?
If you are using LDAP for the authentication, users can be added via "Users and groups -> Administrative user roles". Make sure your LDAP configuration is correctly connected by reviewing your settings in "Security -> Global security".
Finally, you can use wild cards for your search in LDAP such as *b9camp* and see if you have luck that way.