public IResult GetApprovedUsersByRole(int roleId, int approvalEventId)
        {
            var result = new Result
            {
                Operation = Operation.Read,
                Status    = Status.Success
            };

            try
            {
                result.Body = _approvalRepository.GetApprovedUsersByRole(roleId, approvalEventId);
            }
            catch (Exception e)
            {
                result.Message = e.Message;
                result.Status  = Status.Error;
            }
            return(result);
        }