get https://campaign-api.omni.chat/v1/stats/
Retrieves campaign results for a period informed by parameter. If the period is not informed, the last 7 days will be considered.
Returns the following information grouped by campaign:
- sent: total messages sent in the period.
- delivered: total messages delivered in the period.
- read: total messages read in the period.
- error: total messages failed in the period.