How do I re-authenticate an account?

You received webhook: account.stopped or account.invalid. The /a/client_id/accounts/id endpoint returns a sync_stateof:

• invalid-credentials
• stopped

See: https://developer.nylas.com/docs/the-basics/manage-accounts/account-sync-status/#account-management 

Resolution:

Hosted Authentication used by 80% of apps: 

https://developer.nylas.com/docs/api#get/oauth/authorize

Native Authentication less common:

https://developer.nylas.com/docs/api#post/connect/authorize 

Best Practice:

1. Start by authenticating the account.
2. Then using attribute keep_access_token call /revoke-all endpoint . This will ensure that you are using the correct token.