public async Task <long> AddRoleAsync(Role role)
{
ValidateNotNull(role);
await ValidateUniqueId(_roleDao, role.Id);
var roleExist = await _roleDao.ExistAsync(role.Label);
if (roleExist.Exist)
{
var duplicateEntryException = new DuplicateEntryException(roleExist.Id, "Role label already exist!");
Logger.Error(duplicateEntryException, "{Role} label already exists", role);
throw duplicateEntryException;
}
return((await _roleDao.FluentInsert(role).ExecuteAsync()).FirstOrDefault());
}