auth_encoded = base64.b64encode(auth.encode()).decode().rstrip()
self.io.send_line("AUTHENTICATE " + auth_encoded)
self.io.send_line("CAP END")
auth_encoded = base64.b64encode(auth.encode()).decode().rstrip()
self.io.send_line("AUTHENTICATE " + auth_encoded)
self.io.send_line("CAP END")