[sokoloff]

I read “may request” and “may be requested” quite literally. They may request it, but it doesn’t say providing it is compulsory.

I have nothing to hide, but still no intention to provide my passcode.

[natch]

If you have any friends or contacts or family who have ever shared any private information with you of any kind (phone number, address, photo, private opinions, etc.) you damn well have something to hide.

[sokoloff]

That was a callback to "if you have nothing to hide, you have nothing to fear." Even if that didn’t land, I think it's clear from the rest of the context that I don't intend to provide my passcode.