Please make sure you have searched for information in the following guides.

• Search the issues already opened: https://github.com/GoogleCloudPlatform/google-cloud-node/issues
• Search StackOverflow: http://stackoverflow.com/questions/tagged/google-cloud-platform+node.js
• Check our Troubleshooting guide: https://github.com/googleapis/google-cloud-node/blob/main/docs/troubleshooting.md
• Check our FAQ: https://github.com/googleapis/google-cloud-node/blob/main/docs/faq.md
• Check our libraries HOW-TO: https://github.com/googleapis/gax-nodejs/blob/main/client-libraries.md
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• Check out handwritten samples for many of our APIs: https://github.com/GoogleCloudPlatform/nodejs-docs-samples

A screenshot that you have tested with "Try this API".

Appears like the latest version of googleapis is incompatible with google-auth-library.

A step-by-step description of how to reproduce the issue, based on the linked reproduction.

const oauth2Client = new OAuth2Client(
  config.GOOGLE_OAUTH2_CLIENT_ID,
  config.GOOGLE_OAUTH2_CLIENT_SECRET,
  pathToAbsoluteUrl(getPath('/oauth/google/callback')),
);

const result = await oauth2Client.getToken(code);

const tokens = result.tokens;

oauth2Client.setCredentials({
  access_token: tokens.access_token,
});

const oauth2 = google.oauth2({
  auth: oauth2Client,
  version: 'v2',
});

A clear and concise description of what the bug is, and what you expected to happen.

The above code sample is giving:

No overload matches this call.
  Overload 1 of 2, '(version: "v2"): Oauth2', gave the following error.
    Argument of type '{ auth: OAuth2Client; version: string; }' is not assignable to parameter of type '"v2"'.
  Overload 2 of 2, '(options: Options): Oauth2', gave the following error.
    Type 'OAuth2Client' is not assignable to type 'string | GoogleAuth<AuthClient> | OAuth2Client | BaseExternalAccountClient | undefined'.
      Type 'OAuth2Client' is missing the following properties from type 'OAuth2Client': fetch, addUserProjectAndAuthHeadersts(2769)

A clear and concise description WHY you expect this behavior, i.e., was it a recent change, there is documentation that points to this behavior, etc. **

Because it worked prior to the latest upgrade and it is not described as a breaking change in the changelog.