Hello,

Maybe you could use

CMS.Community.GroupMemberInfoProvider.GetCompleteSiteMembers(string where, string orderBy, int topN, string columns);

which returns records with information about members with complete user and site info.

The query which does this method call is:

community.groupmember.selectMemberUsersInSites which uses a view View_Community_Member, where you have all the columns like Email, Username,..

Regards,
Zdenek