[Vertex AI] The constructor does not expose a way to pass custom google credentials

[lbguilherme]

Doing new AnthropicVertex() will use the default google credentials. But sometimes this is not what we want to do. Currently we had to use this hack to get it working:

const anthropic = new AnthropicVertex({
  region: '...',
  projectId: '...',
});

anthropic._auth = new GoogleAuth({
  scopes: 'https://www.googleapis.com/auth/cloud-platform',
  credentials: JSON.parse(process.env.GOOGLE_CREDENTIALS!),
});
anthropic._authClientPromise = anthropic._auth.getClient();

It would be better if an optional credentials option could be passed into the AnthropicVertex constructor.

[rattrayalex]

Thank you for filing, I agree that sounds like a good idea! We'll look into it more soon.

[RobertCraigie]

What do you think about supporting an authConfig?: GoogleAuth option instead? This way we wouldn't have to add support for each config option individually

const anthropic = new AnthropicVertex({
  region: '...',
  projectId: '...',
  authConfig: new GoogleAuth({
      scopes: 'https://www.googleapis.com/auth/cloud-platform',
      credentials: JSON.parse(process.env.GOOGLE_CREDENTIALS!),
    })
});

[RobertCraigie]

A googleAuth client option will be included in the next release!