public static void CheckCorrectAssigning(this AppUserRole userRole, Item existingItem, Item newItem, string userId)
        {
            // if assigning not changed -> OK
            if (existingItem.AssignedUserId == newItem.AssignedUserId)
            {
                return;
            }

            // if user master or owner -> OK
            if (userRole.IsScrumMasterOrOwner())
            {
                return;
            }

            // check if developer can assign item
            if (userRole.DevAssignOperations(existingItem, newItem, userId))
            {
                return;
            }
            throw new ForbiddenResponseException("You dont have access to change assigning. Please, call your scrum-master or owner.");
        }