curl --request GET \
  --url https://api.example.com/api/v2/external/billing/credits

{
  "available_credits": 123,
  "used_credits": 123,
  "total_credits_used": 123,
  "remaining_credits": 123,
  "monthly_free_credits": 0,
  "purchased_credits": 0,
  "signup_grant_claimed_at": "2023-11-07T05:31:56Z"
}