Add Whonix's Signing Key

When attempting to add the Whonix signing key, the following error message is returned:

sudo apt-key --keyring /etc/apt/trusted.gpg.d/whonix.gpg add ~/patrick.asc

Warning: apt-key is deprecated. Manage keyring files in trusted.gpg.d instead (see apt-key(8))

The documentation didn’t mention an alternative method.

Where did you find these instructions? These are outdated.

I don’t know what you’re attempting to do but perhaps is this…

And if it is, then the instructions are up to date and not using apt-key.

Written just now:
Wiki is the Primary Source of Information vs Forums