Google Auth Platform : question about "Desktop App" client and secret

[G_Apps]

Same i’m facing

Desktop OAuth PKCE exchange returns invalid_request after successful loopback callback, with no client secret

Hello, I am troubleshooting a Test-only Google Cloud OAuth setup and would appreciate guidance on the documented configuration requirements for this case: - OAuth client type: Desktop app. - App status: External, Testing; a dedicated Test user is allowlisted. - Requested Drive scope: metadata-only. - A native macOS browser completes consent and reaches the bare loopback callback successfully. - The authorization-code exchange sends `client_id`, `code`, `code_verifier`, `grant_type=authoriz…

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