public async Task<IHttpActionResult> LookupPartitionResolver()
{
string[] collections = AppSettingsConfig.MainCollection.Split(',');
var database = await DocumentClientHelper.GetNewDatabaseAsync(_client, AppSettingsConfig.Db);
LookupPartitionResolver<string> lookupResolver = await PartitionInitializers.InitializeLookupPartitionResolver("UserId", _client, database, collections);
return Ok();
}