[S]
users = ["user1", "user2"]

[A]
users = ["user3", "user4"]

[B]
users = ["user5", "user6"]

[C]
users = ["user7", "user8"]

[D]
users = ["user9", "user10"]

[E]
users = ["user11", "user12"]

[F]
users = ["user13", "user14"]