# User changed email account password

Source: https://developer.nylas.com/docs/support/troubleshooting/changed-password/

If a user changes the password for their email account or revokes access to your Nylas application, Nylas returns a `401` or `403` error (see [Client error responses: 400-499](/docs/api/errors/400-response/)). The email provider might take up to an hour to revoke the user's refresh token, but Nylas returns an error immediately.

When this happens, the user must re-authenticate their account with your Nylas application. For more information, see the [Re-authenticate grants documentation](/docs/dev-guide/best-practices/manage-grants/#re-authenticate-a-grant).