Issue

• For interested users who want to use to store the user authorization to be used for their jBPM6 task service in database through the use of org.jbpm.services.task.identity.DBUserGroupCallbackImpl implementation class is there any table structure requirements which would be used by this this UserGroupCallback implementation?
• Precisely speaking what could be the demo queries for the following checks to be made through the proposed org.jbpm.services.task.identity.DBUserGroupCallbackImpl implementation?
  (1) To check whether the specified UserID exists or not.
  (2) To check whether the specified GroupID exists or not.
  (3) To fetch the GroupID list that the specified UserID belong to.
  (4) UserID and GroupID format is the charactors equal and less than 255.