public IActionResult Index()
{
DepartmentGroupsModel model = new DepartmentGroupsModel();
model.Users = _departmentsService.GetAllUsersForDepartment(DepartmentId);
model.Groups = _departmentGroupsService.GetAllGroupsForDepartmentUnlimited(DepartmentId);
model.CanAddNewGroup = _limitsService.CanDepartentAddNewGroup(DepartmentId);
return(View(model));
}