fix: ensure slot hidden accounts are skipped

crates/sozo/ops/src/migration/mod.rs

@@ -84,7 +84,14 @@ async fn get_declarers_accounts<A: ConnectedAccount>(
 
  for a in vals {
  let address = a["address"].as_str().unwrap();
- let private_key = a["privateKey"].as_str().unwrap();
+
+ // On slot, some accounts are hidden, we skip them.
+ let private_key = if let Some(pk) = a["privateKey"].as_str() {
+ pk
+ } else {
+ continue;
+ };
+
  let provider = AnyProvider::JsonRpcHttp(JsonRpcClient::new(HttpTransport::new(
  Url::parse(rpc_url).unwrap(),
  )));