Update billing info
documentedUpdate or replace billing information for an account.
POST /sites/{site_id}/accounts/{account_id}/billing_infoAccountsno implementation yet0 runsInput
site_id*
Site ID / Subdomain
mysite
account_id*
Account ID or code
acct_12345
token_id*
Billing Info token_id
tok_xxx
gateway_code
Gateway code (optional)
gateway-us-1
Calls Recurly as you (your API key is your account); keychains.dev holds the credentials.