@property
    def proxy_creds(self):
        if not 'Proxy-Authorization' in self.headers:
            return (None, None)
        return Request._parse_basic_auth(self.headers['Proxy-Authorization'])
A username/password tuple representing the username/password to
dataset/ETHPy150Open roglew/pappy-proxy/pappyproxy/http.py/Request.proxy_creds