AttributeError: 'InteractiveLoginAuthentication' object has no attribute 'get_token'

Following this notebook exactly. The only code change being changing create_or_update() to begin_create_or_update() as advised by a previous issue.

```
from azure.mgmt.network import NetworkManagementClient

# Virtual network name
vnet_name ="rl_pong_vnet"

# Default subnet
subnet_name ="default"

# The Azure subscription you are using
subscription_id=ws.subscription_id

# The resource group for the reinforcement learning cluster
resource_group=ws.resource_group

# Azure region of the resource group
location=ws.location

network_client = NetworkManagementClient(ws._auth_object, subscription_id)

async_vnet_creation = network_client.virtual_networks.begin_create_or_update(
resource_group,
vnet_name,
{
'location': location,
'address_space': {
'address_prefixes': ['10.0.0.0/16']
}
}
)

async_vnet_creation.wait()
print("Virtual network created successfully: ", async_vnet_creation.result())
```

I get result:

```
AttributeError Traceback (most recent call last)
in
24 'location': location,
25 'address_space': {
---> 26 'address_prefixes': ['10.0.0.0/16']
27 }
28 }

/anaconda/envs/azureml_py36/lib/python3.6/site-packages/azure/mgmt/network/v2020_08_01/operations/_virtual_networks_operations.py in begin_create_or_update(self, resource_group_name, virtual_network_name, parameters, **kwargs)
319 parameters=parameters,
320 cls=lambda x,y,z: x,
--> 321 **kwargs
322 )
323

/anaconda/envs/azureml_py36/lib/python3.6/site-packages/azure/mgmt/network/v2020_08_01/operations/_virtual_networks_operations.py in _create_or_update_initial(self, resource_group_name, virtual_network_name, parameters, **kwargs)
261 body_content_kwargs['content'] = body_content
262 request = self._client.put(url, query_parameters, header_parameters, **body_content_kwargs)
--> 263 pipeline_response = self._client._pipeline.run(request, stream=False, **kwargs)
264 response = pipeline_response.http_response
265

/anaconda/envs/azureml_py36/lib/python3.6/site-packages/azure/core/pipeline/_base.py in run(self, request, **kwargs)
209 else _TransportRunner(self._transport)
210 )
--> 211 return first_node.send(pipeline_request) # type: ignore

/anaconda/envs/azureml_py36/lib/python3.6/site-packages/azure/core/pipeline/_base.py in send(self, request)
69 _await_result(self._policy.on_request, request)
70 try:
---> 71 response = self.next.send(request)
72 except Exception: # pylint: disable=broad-except
73 if not _await_result(self._policy.on_exception, request):

/anaconda/envs/azureml_py36/lib/python3.6/site-packages/azure/mgmt/core/policies/_base.py in send(self, request)
45 # type: (PipelineRequest[HTTPRequestType], Any) -> PipelineResponse[HTTPRequestType, HTTPResponseType]
46 http_request = request.http_request
---> 47 response = self.next.send(request)
48 if response.http_response.status_code == 409:
49 rp_name = self._check_rp_not_registered_err(response)

/anaconda/envs/azureml_py36/lib/python3.6/site-packages/azure/core/pipeline/_base.py in send(self, request)
69 _await_result(self._policy.on_request, request)
70 try:
---> 71 response = self.next.send(request)
72 except Exception: # pylint: disable=broad-except
73 if not _await_result(self._policy.on_exception, request):

/anaconda/envs/azureml_py36/lib/python3.6/site-packages/azure/core/pipeline/_base.py in send(self, request)
69 _await_result(self._policy.on_request, request)
70 try:
---> 71 response = self.next.send(request)
72 except Exception: # pylint: disable=broad-except
73 if not _await_result(self._policy.on_exception, request):

/anaconda/envs/azureml_py36/lib/python3.6/site-packages/azure/core/pipeline/_base.py in send(self, request)
69 _await_result(self._policy.on_request, request)
70 try:
---> 71 response = self.next.send(request)
72 except Exception: # pylint: disable=broad-except
73 if not _await_result(self._policy.on_exception, request):

/anaconda/envs/azureml_py36/lib/python3.6/site-packages/azure/core/pipeline/_base.py in send(self, request)
69 _await_result(self._policy.on_request, request)
70 try:
---> 71 response = self.next.send(request)
72 except Exception: # pylint: disable=broad-except
73 if not _await_result(self._policy.on_exception, request):

/anaconda/envs/azureml_py36/lib/python3.6/site-packages/azure/core/pipeline/policies/_redirect.py in send(self, request)
155 redirect_settings = self.configure_redirects(request.context.options)
156 while retryable:
--> 157 response = self.next.send(request)
158 redirect_location = self.get_redirect_location(response)
159 if redirect_location and redirect_settings['allow']:

/anaconda/envs/azureml_py36/lib/python3.6/site-packages/azure/core/pipeline/policies/_retry.py in send(self, request)
434 start_time = time.time()
435 self._configure_timeout(request, absolute_timeout, is_response_error)
--> 436 response = self.next.send(request)
437 if self.is_retry(retry_settings, response):
438 retry_active = self.increment(retry_settings, response=response)

/anaconda/envs/azureml_py36/lib/python3.6/site-packages/azure/core/pipeline/_base.py in send(self, request)
67 :rtype: ~azure.core.pipeline.PipelineResponse
68 """
---> 69 _await_result(self._policy.on_request, request)
70 try:
71 response = self.next.send(request)

/anaconda/envs/azureml_py36/lib/python3.6/site-packages/azure/core/pipeline/_tools.py in await_result(func, *args, **kwargs)
27 def await_result(func, *args, **kwargs):
28 """If func returns an awaitable, raise that this runner can't handle it."""
---> 29 result = func(*args, **kwargs)
30 if hasattr(result, "__await__"):
31 raise TypeError(

/anaconda/envs/azureml_py36/lib/python3.6/site-packages/azure/core/pipeline/policies/_authentication.py in on_request(self, request)
91
92 if self._token is None or self._need_new_token:
---> 93 self._token = self._credential.get_token(*self._scopes)
94 self._update_headers(request.http_request.headers, self._token.token)
95

AttributeError: 'InteractiveLoginAuthentication' object has no attribute 'get_token'
```