Get usage of the specified device.
Returns the JSON dictionary describing the account usage in current month or previous month in case it is called in the 1st of the month.
It supports query string detailed=true to include daily details in the response (by default they won't be included).
In case the report for a specific period is needed can use start_date and/or end_date query strings, which are expected in the %Y-%m-%d format.
Current date usage is not included as the day is not finished.