The (inclusive) beginning of the requested time frame. This value can be a negative integer representing the number of minutes in the past relative to time the request is made, or can be an absolute timestamp that conforms to RFC 3339. At this point in time, it cannot exceed a time in the past greater than one year.Ranges that the Cloudflare web application provides will provide the following period length for each point:
Last 60 minutes (from -59 to -1): 1 minute resolution