List of Advanced Trade error messages?

Where to find the list of error messages sent by the Advanced Trade API? They do not seem to match the Sign-In API based of a few reports on the forum
The documentation mentions that the timestamp in the auth should match within 30s, what is the error returned in this case (it says rejected or failed) but most GET do not have a failure_reason in their response

Hello @MementoMori! We hear your suggestion for the List of Advance Trade error messages for the API responses, rest assured that we’ve logged this as a feedback request with our internal teams so we can continue improving our user experience. Most new features and improvements to our products come directly from feedback like yours, so it’s very valuable to us. While we can’t offer any specific timeline for adding features, we are constantly working to build products our customers will love.

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We really appreciate you for bringing this up to our attention, thank you!