Let's Encrypt has an account keypair you use to sign your API requests when issuing a certificate. Does anyone use their OpenPGP key as their letsencrypt accou

Let's Encrypt has an account keypair you use to sign your API requests when issuing a certificate. Does anyone use their OpenPGP key as their letsencrypt account key? How would you convert the signatures from gpg into the jws for the letsencrypt ACME API?