Could you explain me why the amount of monthly unique visitors differs from the sum of the daily unique visitors of that same month? Example: if I export the main metrics by month, the amount of unique visitors for December 2017 is 26.006. If I export the main metrics table by day and I sum up the unique visitors of the 31 days of December 2017, I get 36.311 unique visitors for that month…
Many thanks in advance,
Have you tried doing the same with an HTTP REST request? The values that you enter for the &date and &period parameters might offer a clue.