private async Task <string[]> RetrieveTenants()
{
return((!TenantNamesOrIds.Contains("*") && TenantNamesOrIds.Any())
? (await Repository.Tenants.FindByNamesOrIdsOrFail(TenantNamesOrIds).ConfigureAwait(false)).Select(ten => ten.Id).ToArray()
: TenantNamesOrIds.ToArray());
}
