curl --location "$BASE_URL/merchant-account/create" \
  --header "x-admin-secret: <admin_secret>" \
  --header "Content-Type: application/json" \
  --data '{
    "merchant_id": "merchant_demo",
    "gateway_success_rate_based_decider_input": null
  }'

{
  "message": "Merchant account created successfully",
  "merchant_id": "merchant_demo",
  "gateway_success_rate_based_decider_input": null,
  "api_key": "DE_..."
}