fix: rollback and fix

run.sh

@@ -35,7 +35,7 @@ cmd_argument_builder () {
     "client")
       [[ "$PORT" ]]            && args="$args --port $PORT";
       [[ "$HOST" ]]            && args="$args --host $HOST";
-      [[ "$KEY" ]]             && args="$args $KEY";
+      [[ "$KEY" ]]             && args="$args --connect $KEY";
       [[ "$UDP" = "true" ]]    && args="$args --udp";
       ;;
     "server")