opti(cert): idty/membership should be validated/claim manually

end2end-tests/tests/common/cert.rs

@@ -26,7 +26,7 @@ pub async fn certify(
     from: AccountKeyring,
     to: AccountKeyring,
 ) -> Result<()> {
-    let signer = PairSigner::new(from.clone().pair());
+    let signer = PairSigner::new(from.pair());
     let from = from.to_account_id();
     let to = to.to_account_id();