def verify
      certificate = firebase_id_token_certificates.find(@kid)
      if certificate
        payload = decode_jwt_payload(@jwt_token, certificate.public_key)
        authorize payload
      end
    end
def verify
      certificate = firebase_id_token_certificates.find(@kid)
      if certificate
        payload = decode_jwt_payload(@jwt_token, certificate.public_key)
        authorize payload
      end
    end
Loads attributes: `:project_ids` from {FirebaseIdToken::Configuration},
 and `:kid`, `:jwt_token` from the related `jwt_token`.
 @param [String] jwt_token Firebase ID Token
 @see Signature.verify