$start_time (String, required): The start time of the period for which to query statistics, in UTC. Format should be in ISO 8601 (e.g., YYYY-MM-DDTHH:MM:SSZ).
$end_time (String, required): The start time of the period for which to query statistics, in UTC. Format should be in ISO 8601 (e.g., YYYY-MM-DDTHH:MM:SSZ). This time must be after the start_time.
$offset (Int, required): The local time offset from UTC for the query, specified in hours. (e.g., EST is -0400.)