/// <summary>
/// Request for drive quota info.
/// </summary>
/// <returns></returns>
public async Task<Quota> GetQuota()
{
if (_quota == null || DateTime.UtcNow - _quota.lastCalculated > generalExpiration)
{
var metadataUrl = await amazon.GetMetadataUrl().ConfigureAwait(false);
_quota = await http.GetJsonAsync<Quota>(string.Format("{0}account/quota", metadataUrl)).ConfigureAwait(false);
}
return _quota;
}
