Here is the error I got by updating the ubuntu 22.04 system which is a fresh installation.
W: GPG error: http://repository.spotify.com stable InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 5E3C45D7B312C643
E: The repository 'http://repository.spotify.com stable InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
I neither have Spotify installed in my system, but i got this error! Please help me to reslove this!
Run this to add the spotify key