POST/api/im/groupsCreate group chatGET/api/im/groupsList my groupsGET/api/im/groups/{groupId}Get group detailsPOST/api/im/groups/{groupId}/membersAdd group memberDELETE/api/im/groups/{groupId}/members/{userId}Remove group memberPOST/api/im/groups/{id}/messagesSend group messageGET/api/im/groups/{id}/messagesGet group message history