Get one plan

A single active plan you own: the per-customer read for a reseller dashboard. dataGbRemaining is refreshed from the network's own meter on this call (one network read per plan per minute; between reads you get the last reading), and usageAsOf says when that reading was taken. The list endpoint carries the usage sync's reading instead, taken about every 30 minutes, so poll this door when you show a customer what is left. The network enforces the plan's cap itself, in real time: a customer cannot use more than the plan holds, whatever the figure here shows between readings.