map list:
test
users
test
users
contents of example.com:test:
group1	user2a
group2	group1-fake-uid,user2b,user2a
contents of example.com:users:
user1	user1:user1
user1a	user1a:User 1 A
user1b	user1b:User 1 B
user1c	user1c:User 1 C
user2a	user2a:User 2 A
user2b	user2b:User 2 B
user2c	user2c:User 2 C