code: static UserLimits getLimitsFromUserAccount(HTTPServerConfig config, String username, String password) {
      Objects.requireNonNull(username);
      Objects.requireNonNull(password);
      String token = cache.getUnchecked(new Account(username, password));
      return getLimitsFromToken(config, token);
    }
docs: Special case that checks user on languagetoolplus.com.