code: public OvhOrder cloud_project_serviceName_credit_GET(String serviceName, Long amount) throws IOException {
  		String qPath = "/order/cloud/project/{serviceName}/credit";
  		StringBuilder sb = path(qPath, serviceName);
  		query(sb, "amount", amount);
  		String resp = exec(qPath, "GET", sb.toString(), null);
  		return convertTo(resp, OvhOrder.class);
  	}
docs: Get prices and contracts information
  
  REST: GET /order/cloud/project/{serviceName}/credit
  @param amount [required] Amount to add in your cloud credit
  @param serviceName [required] The project id