message: Remove the private key from response so it is not actually sent to the client. but send a placeholder to know it is on the server
diff: @@ -446,6 +446,10 @@ export async function signinWallet(a_email: string, password: string) {
  // remove some of the properties the client should not have access to
  delete wallet.password_hash;
  delete wallet.password_salt;
  + // remove the private_key but note that it was set in the wallet object
  + if (wallet.private_key) {
  + wallet.private_key = 'y';
  + }
  return wallet;
  }
  