Zend certified PHP/Magento developer

Beginner using arco linux, One or more pgp signatures coud not be verified

==> Verifying source file signatures with gpg... spotify-1.2.26.1187-1-Release ... %s is unable to verify the signature. gpg ==> ERROR: One or more PGP signatures could not be verified!

I tried to look it up and the superuser forum posts didn’t really help. I cant find this mystical “local gpg key pair” they are talking about. I Set up some sort of gpg key (i think) after trying to follow a tutorial but no luck. Any help?