We see nearly the same message as the screenshot above, except that we did register our site with Google, so our warning only includes a bit about the site is registered but not configured securely. In order for this to be a viable feature for our users, we'd need to find a way to have Google not display that warning. From what I can find online this would require having Moodle use secure tokens, but from what I can see Moodle does not support this in their use of the AuthSub utility.
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