It sounds like you’re on the right track! The error you’re seeing typically happens when the app you’re trying to connect to (in this case, integromat.com or Make) hasn’t been fully verified by Google, which limits access to only those users explicitly added as test users in the Google Cloud Console.
To fix this, adding yourself as a test user is indeed the right step. Here’s a quick rundown of what you should do:
- Go to the Google Cloud Console.
- Navigate to your project.
- Find “OAuth consent screen” on the left menu.
- Scroll down to the “Test users” section.
- Add your Gmail address to the list of test users and save.
Once you’ve done this, try connecting again. You should be able to proceed without the 403 error.