enviar contraseña a pcp_recovery_node -h 192.168.1.48 -p 9898 -U pgpool -n 1

void send_pcp_password_to_node(string node_ip, string node_port, string user, string password, int node_id) {
  string command = "pcp_recovery_node -h " + node_ip + " -p " + node_port + " -U " + user + " -n " + to_string(node_id) + " -w " + password;
  system(command.c_str());
}