Setting credentials fails when multiple data sources are used

Preflight Checklist

• I have installed the latest version of Power Query SDK.
• I have checked existing resources, including the common issues and the release notes.
• I have searched for similar issues.

Power Query SDK

0.1.7

Regression From

No response

Platform

Windows

Architecture

x64

OS Version

No response

VSCode version

No response

PQSdkTool Path

No response

Bug Description

When "Set credential" or pqTest set-credential is run for a file that uses multiple data sources, credential setting dies with an error along the lins of: Error: Expected 1 data source in expression, but 2 were found..

Steps to Reproduce

Connector:

section MyTester;

[DataSource.Kind="MyTester"]
shared MyTester.Do = () => "hi";

[DataSource.Kind="MyTester2"]
shared MyTester2.Do = (code) => "hi";

MyTester = [Authentication = [Implicit = []]];  

MyTester2 = [Authentication = [Implicit = []]];  

Test query:

{ MyTester.Do(), MyTester2.Do("abc") }

Actual Experience

PQTest.exe set-credential `
>> --extension "c:\Users\ben\Desktop\TestConnector\BenTest\bin\AnyCPU\Debug\BenTest.mez"`
>> --queryFile "c:\Users\ben\Desktop\TestConnector\BenTest\BenTest.query.pq"`
>> --prettyPrint -ak Anonymous
Error: Expected 1 data source in expression, but 2 were found.

Expected Experience

Should be allowed to set credentials.

In order for this to work, need a way to specify from the command line which data source I'm setting credentials for, then would need to run set-credentials twice, once per source.

Additional Context

No response