Create API key

Mint a sandbox key, prefixed env_test_ instead of smr_. Requests on a sandbox key are validated, priced and recorded exactly like live ones — opt-out list, sender rules, phishing screen and quota all apply — but nothing is delivered to a carrier, no balance is debited and no invoice line is created. A simulated delivery receipt follows a few seconds later, including the delivered webhook. Sends and OTPs made with a sandbox key are excluded from analytics and are only visible to sandbox keys. A key's mode is fixed at creation; create a new key to switch.