DB connection issue in bike tutorial ipnb

[csaranbalaji]

As mentioned in #22, Checked the bike-tutorial.
Using the latest version of terminusdb and terminusdb-client .
terminusdb-client = 0.4.0

Exception trace:

~/personal_repos/pycon-devsprint2020/terminusdb/terminusdb-bootstrap/env/lib/python3.7/site-packages/urllib3/connectionpool.py in urlopen(self, method, url, body, headers, retries, redirect, assert_same_host, timeout, pool_timeout, release_conn, chunked, body_pos, **response_kw)
    676                 headers=headers,
--> 677                 chunked=chunked,
    678             )

~/personal_repos/pycon-devsprint2020/terminusdb/terminusdb-bootstrap/env/lib/python3.7/site-packages/urllib3/connectionpool.py in _make_request(self, conn, method, url, timeout, chunked, **httplib_request_kw)
    425                     # Otherwise it looks like a bug in the code.
--> 426                     six.raise_from(e, None)
    427         except (SocketTimeout, BaseSSLError, SocketError) as e:

~/personal_repos/pycon-devsprint2020/terminusdb/terminusdb-bootstrap/env/lib/python3.7/site-packages/urllib3/packages/six.py in raise_from(value, from_value)

~/personal_repos/pycon-devsprint2020/terminusdb/terminusdb-bootstrap/env/lib/python3.7/site-packages/urllib3/connectionpool.py in _make_request(self, conn, method, url, timeout, chunked, **httplib_request_kw)
    420                 try:
--> 421                     httplib_response = conn.getresponse()
    422                 except BaseException as e:

/usr/local/Cellar/python/3.7.5/Frameworks/Python.framework/Versions/3.7/lib/python3.7/http/client.py in getresponse(self)
   1343             try:
-> 1344                 response.begin()
   1345             except ConnectionError:

/usr/local/Cellar/python/3.7.5/Frameworks/Python.framework/Versions/3.7/lib/python3.7/http/client.py in begin(self)
    305         while True:
--> 306             version, status, reason = self._read_status()
    307             if status != CONTINUE:

/usr/local/Cellar/python/3.7.5/Frameworks/Python.framework/Versions/3.7/lib/python3.7/http/client.py in _read_status(self)
    274             # sending a valid response.
--> 275             raise RemoteDisconnected("Remote end closed connection without"
    276                                      " response")

RemoteDisconnected: Remote end closed connection without response

During handling of the above exception, another exception occurred:

ProtocolError                             Traceback (most recent call last)
~/personal_repos/pycon-devsprint2020/terminusdb/terminusdb-bootstrap/env/lib/python3.7/site-packages/requests/adapters.py in send(self, request, stream, timeout, verify, cert, proxies)
    448                     retries=self.max_retries,
--> 449                     timeout=timeout
    450                 )

~/personal_repos/pycon-devsprint2020/terminusdb/terminusdb-bootstrap/env/lib/python3.7/site-packages/urllib3/connectionpool.py in urlopen(self, method, url, body, headers, retries, redirect, assert_same_host, timeout, pool_timeout, release_conn, chunked, body_pos, **response_kw)
    726             retries = retries.increment(
--> 727                 method, url, error=e, _pool=self, _stacktrace=sys.exc_info()[2]
    728             )

~/personal_repos/pycon-devsprint2020/terminusdb/terminusdb-bootstrap/env/lib/python3.7/site-packages/urllib3/util/retry.py in increment(self, method, url, response, error, _pool, _stacktrace)
    402             if read is False or not self._is_method_retryable(method):
--> 403                 raise six.reraise(type(error), error, _stacktrace)
    404             elif read is not None:

~/personal_repos/pycon-devsprint2020/terminusdb/terminusdb-bootstrap/env/lib/python3.7/site-packages/urllib3/packages/six.py in reraise(tp, value, tb)
    733             if value.__traceback__ is not tb:
--> 734                 raise value.with_traceback(tb)
    735             raise value

~/personal_repos/pycon-devsprint2020/terminusdb/terminusdb-bootstrap/env/lib/python3.7/site-packages/urllib3/connectionpool.py in urlopen(self, method, url, body, headers, retries, redirect, assert_same_host, timeout, pool_timeout, release_conn, chunked, body_pos, **response_kw)
    676                 headers=headers,
--> 677                 chunked=chunked,
    678             )

~/personal_repos/pycon-devsprint2020/terminusdb/terminusdb-bootstrap/env/lib/python3.7/site-packages/urllib3/connectionpool.py in _make_request(self, conn, method, url, timeout, chunked, **httplib_request_kw)
    425                     # Otherwise it looks like a bug in the code.
--> 426                     six.raise_from(e, None)
    427         except (SocketTimeout, BaseSSLError, SocketError) as e:

~/personal_repos/pycon-devsprint2020/terminusdb/terminusdb-bootstrap/env/lib/python3.7/site-packages/urllib3/packages/six.py in raise_from(value, from_value)

~/personal_repos/pycon-devsprint2020/terminusdb/terminusdb-bootstrap/env/lib/python3.7/site-packages/urllib3/connectionpool.py in _make_request(self, conn, method, url, timeout, chunked, **httplib_request_kw)
    420                 try:
--> 421                     httplib_response = conn.getresponse()
    422                 except BaseException as e:

/usr/local/Cellar/python/3.7.5/Frameworks/Python.framework/Versions/3.7/lib/python3.7/http/client.py in getresponse(self)
   1343             try:
-> 1344                 response.begin()
   1345             except ConnectionError:

/usr/local/Cellar/python/3.7.5/Frameworks/Python.framework/Versions/3.7/lib/python3.7/http/client.py in begin(self)
    305         while True:
--> 306             version, status, reason = self._read_status()
    307             if status != CONTINUE:

/usr/local/Cellar/python/3.7.5/Frameworks/Python.framework/Versions/3.7/lib/python3.7/http/client.py in _read_status(self)
    274             # sending a valid response.
--> 275             raise RemoteDisconnected("Remote end closed connection without"
    276                                      " response")

ProtocolError: ('Connection aborted.', RemoteDisconnected('Remote end closed connection without response'))

During handling of the above exception, another exception occurred:

ConnectionError                           Traceback (most recent call last)
<ipython-input-10-4786c25b6cd9> in <module>
     12 
     13 client = woql.WOQLClient(server_url)
---> 14 client.connect(key=key, account=account_id, user=user_id)
     15 
     16 existing = client.get_metadata(db_id, client.uid())

~/personal_repos/pycon-devsprint2020/terminusdb/terminusdb-bootstrap/env/lib/python3.7/site-packages/terminusdb_client/woqlclient/woqlClient.py in connect(self, **kwargs)
     69             self.insecure = kwargs.get("insecure")
     70 
---> 71         json_obj = self.dispatch(APIEndpointConst.CONNECT, self.conConfig.api)
     72         self.conCapabilities.set_capabilities(json_obj)
     73         return json_obj

~/personal_repos/pycon-devsprint2020/terminusdb/terminusdb-bootstrap/env/lib/python3.7/site-packages/terminusdb_client/woqlclient/woqlClient.py in dispatch(self, action, url, payload, file_dict)
   1163             self.remote_auth(),
   1164             file_dict,
-> 1165             self.insecure,
   1166         )
   1167 

~/personal_repos/pycon-devsprint2020/terminusdb/terminusdb-bootstrap/env/lib/python3.7/site-packages/terminusdb_client/woqlclient/dispatchRequest.py in send_request_by_action(cls, url, action, payload, basic_auth, remote_auth, file_dict, insecure)
    150             ]:
    151                 request_response = cls.__get_call(
--> 152                     url, headers, payload, insecure=insecure
    153                 )
    154 

~/personal_repos/pycon-devsprint2020/terminusdb/terminusdb-bootstrap/env/lib/python3.7/site-packages/terminusdb_client/woqlclient/dispatchRequest.py in __get_call(url, headers, payload, insecure)
     28         if not _verify_check(url, insecure):
     29             warnings.simplefilter("ignore", InsecureRequestWarning)
---> 30         result = requests.get(url, headers=headers, verify=_verify_check(url, insecure))
     31         warnings.resetwarnings()
     32         return result

~/personal_repos/pycon-devsprint2020/terminusdb/terminusdb-bootstrap/env/lib/python3.7/site-packages/requests/api.py in get(url, params, **kwargs)
     74 
     75     kwargs.setdefault('allow_redirects', True)
---> 76     return request('get', url, params=params, **kwargs)
     77 
     78 

~/personal_repos/pycon-devsprint2020/terminusdb/terminusdb-bootstrap/env/lib/python3.7/site-packages/requests/api.py in request(method, url, **kwargs)
     59     # cases, and look like a memory leak in others.
     60     with sessions.Session() as session:
---> 61         return session.request(method=method, url=url, **kwargs)
     62 
     63 

~/personal_repos/pycon-devsprint2020/terminusdb/terminusdb-bootstrap/env/lib/python3.7/site-packages/requests/sessions.py in request(self, method, url, params, data, headers, cookies, files, auth, timeout, allow_redirects, proxies, hooks, stream, verify, cert, json)
    528         }
    529         send_kwargs.update(settings)
--> 530         resp = self.send(prep, **send_kwargs)
    531 
    532         return resp

~/personal_repos/pycon-devsprint2020/terminusdb/terminusdb-bootstrap/env/lib/python3.7/site-packages/requests/sessions.py in send(self, request, **kwargs)
    641 
    642         # Send the request
--> 643         r = adapter.send(request, **kwargs)
    644 
    645         # Total elapsed time of the request (approximately)

~/personal_repos/pycon-devsprint2020/terminusdb/terminusdb-bootstrap/env/lib/python3.7/site-packages/requests/adapters.py in send(self, request, stream, timeout, verify, cert, proxies)
    496 
    497         except (ProtocolError, socket.error) as err:
--> 498             raise ConnectionError(err, request=request)
    499 
    500         except MaxRetryError as e:

ConnectionError: ('Connection aborted.', RemoteDisconnected('Remote end closed connection without response'))```

[csaranbalaji]

@Cheukting Could you please check the issue and PR?