Similar frustrations. I was only able auth using some Google app I created for an old project years ago that happened to have the right bits.

It wild that this process is still so challenging. There's got to be some safe streamlined way that sets up an app identity you own that can only use to access your own account.

My guess is that organizationally within Google, the developer app authorization process must have many teams involved in its implementation and many other outside stakeholders. A single unified team wouldn't responsible for this confusion and complexity. I get why... it's a huge source of bad actors. But there's got to be a better way.

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