What is the “keyID” when using APNs push service

Question

Usually there are 3 info I need to provide, to use Apple APNs: key, keyId, teamId, like here.

I understand key (pem file location) and

Answer 1

Key ID can also be derived from the name of the file for the key. Your file with the key will probably be named something like: AuthKey_ABC1DEF11G.p8, so ABC1DEF11G is the key ID.

Team ID can be found on the Apple account webpage (upper right corner).