*/
public static ExternalApiSupport forCall(String login, String md5Pwd) throws ServerAccessException {
Connection conn = openConnectionToBackend();
boolean success = false;
try {
UsersTab usersTab = new UsersTab(conn);
User user = usersTab.getUser(login, md5Pwd);
if (user == null) {
throw new ServerAccessException("Invalid user name and/or password.");
}
ExternalApiSupport wss = new ExternalApiSupport(conn, user, md5Pwd);
success = true;