Retrieve all counters for a participant.
+1. A single counter can track simple counts (e.g. logins, referrals) or running totals (e.g. total purchase volume, monthly spend) by incrementing with event.amount in a rule action. Each counter returns its current value along with its key.
Counters that have auto-reset configured include reset_after (the reset interval) and last_reset_at (when the counter last reset). If the reset window has elapsed since last_reset_at, the effective value is 0 even though the stored value has not yet been cleared.