Access to Phoenix from Python using SPNEGO

import phoenixdb
import phoenixdb.cursor
database_url = 'http://myphoenixdb:8765/'
conn = phoenixdb.connect(database_url, autocommit=True, authentication="SPNEGO")

>>> conn = phoenixdb.connect(database_url, autocommit=True, authentication="SPNEGO")
venv/lib/python3.6/site-packages/phoenixdb/avatica/client.py:121: RuntimeWarning: Unexpected end-group tag: Not all data was converted
 if not err.ParseFromString(message.wrapped_message):
Traceback (most recent call last):
 File "<stdin>", line 1, in <module>
 File "venv/lib/python3.6/site-packages/phoenixdb/_init_.py", line 121, in connect
 return Connection(client, **kwargs)
 File "venv/lib/python3.6/site-packages/phoenixdb/connection.py", line 53, in _init_
 self.open()
 File "venv/lib/python3.6/site-packages/phoenixdb/connection.py", line 98, in open
 self._client.open_connection(self._id, info=self._phoenix_props)
 File "venv/lib/python3.6/site-packages/phoenixdb/avatica/client.py", line 363, in open_connection
 response_data = self._apply(request)
 File "venv/lib/python3.6/site-packages/phoenixdb/avatica/client.py", line 215, in _apply
 parse_error_protobuf(response_body)
 File "venv/lib/python3.6/site-packages/phoenixdb/avatica/client.py", line 128, in parse_error_protobuf
 raise_sql_error(err.error_code, err.sql_state, err.error_message)
 File "venv/lib/python3.6/site-packages/phoenixdb/avatica/client.py", line 96, in raise_sql_error
 raise errors.InternalError(message, code, sqlstate)
phoenixdb.errors.InternalError: ('', 0, '', None)