How to use the oauth2 function from googleapis

googleapis.oauth2 is a module that provides methods to obtain authorization credentials for accessing Google APIs.

How does googleapis.oauth2 work?

googleapis.oauth2 is a module provided by the Google APIs Node.js Client that provides methods to interact with the Google OAuth2 authentication service, which is used to authenticate users and obtain access tokens to access Google APIs. The module includes methods for obtaining user consent to access their Google account data, exchanging authorization codes for access tokens, refreshing access tokens, and revoking access tokens. It also provides methods for managing the user's authentication state and retrieving user profile information. The module uses the OAuth2 protocol to authenticate users and authorize access to their Google data.

Ai Example

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const { google } = require("googleapis");
const OAuth2 = google.auth.OAuth2;

const CLIENT_ID = "your_client_id";
const CLIENT_SECRET = "your_client_secret";
const REDIRECT_URI = "http://localhost:3000/auth/google/callback";

const oauth2Client = new OAuth2(CLIENT_ID, CLIENT_SECRET, REDIRECT_URI);

// Set the access token to the credentials object
oauth2Client.setCredentials({
  access_token: "your_access_token",
});

// Create an instance of the oauth2 object with the credentials object
const oauth2 = google.oauth2({
  auth: oauth2Client,
  version: "v2",
});

// Call the userinfo.get() method to retrieve user's email address
oauth2.userinfo.get((err, res) => {
  if (err) {
    console.error(err);
  } else {
    console.log(res.data.email);
  }
});