The client_id would be found in the details screen in an app you’ve created in HubSpot. If you haven’t already created an app, you can find instructions for doing that here:
Instructions for creating an app in HubSpot. An app is required for using OAuth to authenticate with HubSpot's APIs, and for the Timeline and Webhook APIs.
oAuth2: An error occurred while validating the integration authorization
Thanks for the reply. I just read through the instructions and already have an app setup.
However I’m not able to find the settings page it references.
When I click on the app from the dashboard it brings me to a “Marketing Dashboard”. There’s a settings on the right, but all that allows me to do is set a default date range. None of the menu items in the black bar above seem to be relevant either.
Are the settings only available during initial application creation?