Identify the BigQuery Table in which Billing data is Exported

[cloudGeek]

I have to fetch billing data from BigQuery table in which the billing export was done. I have the project Id and Data set ID. To achieve this I followed these steps:
   1. Fetched the list of tables present in that dataset and checked that table name matches with "gcp_billing_export_resource_v1_".

2. If that table name matches to the above value then i considered this as the billing export table. but here's the problem.I am able to create a table with this prefix and with same schema in that scenario i have two tables here. How to verify which one is valid?

As in GCP doc table name structure is mentioned like "gcp_billing_export_resource_v1_<BILLING_ACCOUNT_ID>" so that i tried to get BILLING ACCOUNT ID for the project. but that also failing. 
the code is :

GetProjectBillingInfoRequest request = GetProjectBillingInfoRequest.newBuilder().setName(ProjectBillingInfoName.of("PROJECT_NAME_HERE").toString()).build();

CloudBillingClient billing = CloudBillingClient.create(settings);

billing.getProjectBillingInfo(request);

in the above code i am getting this error 
"com.google.api.gax.rpc.InvalidArgumentException: io.grpc.StatusRuntimeException: INVALID_ARGUMENT: Request contains an invalid argument."

So I am not able to verify the table that is the one configured for billing export.
What is the change required to achieve this? 

Thank you,
cloudGeek