How to get my Moodle public key?
To get your Moodle public key, first, enable Networking from your Moodle admin panel > Site Administration tab > Advanced Features > Networking. Change the value to On and save the changes.
A new tab will appear in the admin panel named Networking. Click on it and choose Settings. There you will see the public key for your Moodle. It should look like this:
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----