It’s been more than 6 months since I looked at this issue so it‘s not fresh in my memory, but if I remember correctly the issue was that on the right side of the documentation page for this specific endpoint, I can see example of data I can provide for a given user such as pictured in the first screenshot I posted last July (“email_notification” and “feature” are two such examples that are visible in the screenshot) but I couldn’t find any documentation for these settings.
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