@POST @ApiIgnore // until documented
   @Path("{userName}")
   @Produces("text/plain")
   public Response createMember(String body, @Context HttpHeaders headers, @Context UriInfo ui, @PathParam("groupName") String groupName,
                                 @PathParam("userName") String userName) {
    return handleRequest(headers, body, ui, Request.Type.POST, createMemberResource(groupName, userName));
  }
Creates a new member.
Handles: POST /groups/{groupname}/members/{username} requests.

@param headers      http headers
@param ui           uri info
@param groupName    group name
@param userName     the user name
@return information regarding the created member
ambari-server/src/main/java/org/apache/ambari/server/api/services/groups/MemberService.java