Compute the response from the challenge below and your secret, then enter it.
Challenge
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Single use, valid 5 minutes, and spent on any attempt - right or wrong. The $$$ marks where the code starts and ends; everything between them is the challenge. Sign it with or without the markers, either is accepted.
Invalidates every admin session everywhere. Restricted to the Archistructure account.
The same credentials work as a JSON POST for the iPhone shortcut: nonce, username, password. Sessions last while the tab is open, then 15 minutes.
Response is SHA-256(username + nonce + secret) as lowercase hex.