TypeError: callback is not a function #108

I just copy the code of the repository, and run,

Actual Behavior

TypeError: callback is not a function

function authorize(credentials, callback) {
const {client_secret, client_id, redirect_uris} = credentials.web;
const oAuth2Client = new google.auth.OAuth2(
client_id, client_secret, redirect_uris[0]);

// Check if we have previously stored a token.
fs.readFile(TOKEN_PATH, (err, token) => {
if (err) return getNewToken(oAuth2Client, callback);
oAuth2Client.setCredentials(JSON.parse(token));
callback(oAuth2Client);
});
}

Specifications

• Node v12.18.4
• Linux