createGroup
open suspend override fun createGroup(request: CreateGroupRequest): AtpResponse<CreateGroupResponse>
NOTE: This is under active development and should be considered unstable while this note is here. Creates a group convo, specifying the members to be added to it. Unlike getConvoForMembers, this isn't idempotent. It will create new groups even if the membership is identical to pre-existing groups. Will create 'request' membership for all members, except the owner who is 'accepted'.