Public key to check distribution signature?

"BUSH, DAVID F [AG/1005]" <[email protected]> Wed, 18 Sep 2019 13:38:39 +0000
Newsgroups gmane.comp.db.postgresql.pgadmin
Message-ID <[email protected]>
Hi –

Where can I find the public key needed to verify the gpg signature on the MacOS distribution of pgAdmin4?

Thanks,

David.
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