code: public DatabaseAccountListConnectionStringsResultInner listConnectionStrings(String resourceGroupName, String accountName) {
          return listConnectionStringsWithServiceResponseAsync(resourceGroupName, accountName).toBlocking().single().body();
      }
docs: Lists the connection strings for the specified Azure Cosmos DB database account.
  
  @param resourceGroupName Name of an Azure resource group.
  @param accountName Cosmos DB database account name.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @throws CloudException thrown if the request is rejected by server
  @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent
  @return the DatabaseAccountListConnectionStringsResultInner object if successful.