Plan, limits and credits (uses no credits)

label is the plan's name (for example Pro), limits the plan's limits (credits: monthly credits; live and ws: live data and WebSocket connections). credits: remaining (usable now), plan (monthly, used, remaining, period_start, resets_at), packs (credits, remaining, purchased_at, expires_at; valid packs, the one used next first), packs_remaining and used_this_period (all credits used this period, packs included). period_resets_at is credits.plan.resets_at. live: included, sources (the live endpoints' sources), ws_limit and ws_open (concurrent WebSocket connections of the account).