Generate the format expected by HTTP Headers from parameters.

        Args:
          params (dict): {key: value} to convert to key=value

        Returns:
          A formatted header string.

def format_auth_params(params):
        """Generate the format expected by HTTP Headers from parameters.

        Args:
          params (dict): {key: value} to convert to key=value

        Returns:
          A formatted header string.
        """
        parts = []
        for (key, value) in params.items():
            if value:
                parts.append('{}="{}"'.format(key, value))
        return ", ".join(parts)