public async Task <BacklogResponse <Group[]> > GetGroupsAsync(GroupQuery query = null)
{
query = query ?? new GroupQuery();
var response = await GetAsync($"/api/v2/groups", query.Build()).ConfigureAwait(false);
return(await CreateResponseAsync <Group[], List <_Group> >(
response,
HttpStatusCode.OK,
data => data.Select(x => new Group(x, this)).ToArray()).ConfigureAwait(false));
}