PGP Signature Error

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Hi, I have looked through some of the guides on how to install discord but I am still having trouble.
I have imported one of the public keys that was on another thread before and it still made no difference.

I am trying to now follow this guide https://linoxide.com/linux-how-to/install-discord-ubuntu-arch-linux/
But I am confused on how I find out my own “key” and when I find it how I add it?

==> Verifying source file signatures with gpg…
llvm-5.0.1.src.tar.xz … FAILED (unknown public key 8F0871F202119294)
libcxx-5.0.1.src.tar.xz … FAILED (unknown public key 8F0871F202119294)
libcxxabi-5.0.1.src.tar.xz … FAILED (unknown public key 8F0871F202119294)
==> ERROR: One or more PGP signatures could not be verified!
==> ERROR: Makepkg was unable to build libc++.
==> Restart building libc++ ? [y/N]
==> -------------------------------

Any help would be greatly appreciated.

@jimjam

gpg recv-keys 8F0871F202119294

As normal user from terminal

The how-to shows the wrong term, it is NOT your key it needs to be the key of PKGBUILD maintainer…

I have a similar error with the same key and the command comes back with this.

gpg: WARNING: no command supplied. Trying to guess what you mean …
usage: gpg [options] [filename]

Oh I just see autocorrect do a bad job …

It should work like this:

gpg --recv-keys key-id

Replace key-id with maintainers key.

Sorry for that!