Function throwIfProxyAuthIsSent

github-actions/saucelabs/set-saucelabs-env.js:9120–9125

(headers)

        if (typeof opts === "string") {
          return new URL2(opts);
        } else if (opts instanceof URL2) {
          return opts;
        } else {
          return new URL2(opts.uri);
        }
      };
      function buildHeaders(headers) {
        if (Array.isArray(headers)) {
          const headersPair = {};