Getting Request had invalid authentication credentials.

[janvda]

More precisely the following error is raised in node-red editor:

StatusCodeError: 401 - {"error":{"code":401,"message":"Request had invalid authentication credentials. Expected OAuth 2 access token, login cookie or other valid authentication credential. See https://developers.google.com/identity/sign-in/web/devconsole-project.","status":"UNAUTHENTICATED"}}

[janvda]

Interesting links:

• https://github.com/googleapis/google-api-nodejs-client
• https://console.cloud.google.com/apis/credentials (to reset credentials)

[janvda]

Further investigation revealed that the access token expires after 1 hour.
google.auth.OAuth2 is automatically retrieving new access token using the refresh token but the new access token is not used by Photos().

For this googlephotos library will be extended with a new method to update the access token => see roopakv/google-photos#19

[janvda]

when the acces_token expires, it is also not automatically refreshed or more precisely the method oauth2Client.on('tokens', ... is never triggered.

So, it is not clear how I can "force" an automatic refresh of the access token.
See also googleapis/google-api-nodejs-client#1177

See also googleapis/google-api-nodejs-client#1256

[janvda]

This has been fixed by commit 43d3387 and earlier commits.

So it will during startup use the refresh token to request a new access token.