curl "https://api.stableyard.fi/v2/accounts/acc_123/keys" \
  -H "Authorization: Bearer sy_auth_*"

{
  "apiKeys": {
    "secretKey": "sy_secret_xxx",
    "publicKey": "sy_pub_xxx",
    "testSecretKey": "sy_test_secret_xxx",
    "testPublicKey": "sy_test_pub_xxx",
    "webhookSecret": "whsec_xxx"
  },
  "requestId": "req_abc123"
}