MembersDict
A dictionary object containing the members of a group
For each entry in the dictionary the key is the member's stable id, while the value is a dictionary object with 3 keys:
GAttrLongID - The long id of the member
GAttrSecurityDomain - The security domain of the member
KeyType - The type of the member. Valid values are: 'account' or 'group'
An example is:
membersDict = {'user1': {GAttrLongID: 'user1', GAttrSecurityDomain: 'domain1', KeyType: 'account'}}