Problem with uninstall instructions

[kkh2 at cornell.edu]

I am using the uninstall instructions given here:

    https://guide.macports.org/chunked/installing.macports.uninstalling.html

I got as far as this command:

    $ dscl -p . -delete /Users/macports


After I typed in my password, it responded:

    Data source (.) is not valid.

I am using macOS 10.13.6 (my hardware allows no higher version, and my
finances allow no higher hardware).

What should I do?

Thank you.

K
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