Error when installing on Azure CLI #718

tommy@Azure:~$ wget -q https://raw.githubusercontent.com/Azure/aztk/v0.9.1/account_setup.shwget -q https://raw.githubusercontent.com/Azure/aztk/v0.9.1/account_setup.sh
tommy@Azure:~$ chmod 755 account_setup.sh
tommy@Azure:~$ /bin/bash account_setup.sh
Installing dependencies...

Finished installing dependencies.
Getting account setup script...
Finished getting account setup script.
Running account setup script...

Getting credentials.
Your credentials class does not support session injection. Performance will not be at the maximum.
Traceback (most recent call last):
  File "/home/tommy/.local/lib/python3.5/site-packages/msrest/pipeline/requests.py", line 65, in send
    self._creds.signed_session(session)
  File "/home/tommy/.local/lib/python3.5/site-packages/azure/common/credentials.py", line 78, in signed_session
    return credentials.signed_session(session)
TypeError: signed_session() takes 1 positional argument but 2 were given

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "account_setup.py", line 332, in <module>
    tenant_ids = [tenant.id for tenant in subscription_client.tenants.list()]
  File "account_setup.py", line 332, in <listcomp>
    tenant_ids = [tenant.id for tenant in subscription_client.tenants.list()]
  File "/home/tommy/.local/lib/python3.5/site-packages/msrest/paging.py", line 143, in __next__
    self.advance_page()
  File "/home/tommy/.local/lib/python3.5/site-packages/msrest/paging.py", line 129, in advance_page
    self._response = self._get_next(self.next_link)
  File "/home/tommy/.local/lib/python3.5/site-packages/azure/mgmt/subscription/operations/tenants_operations.py", line 81, in internal_paging
    request, header_parameters, **operation_config)
  File "/home/tommy/.local/lib/python3.5/site-packages/msrest/service_client.py", line 336, in send
    pipeline_response = self.config.pipeline.run(request, **kwargs)
  File "/home/tommy/.local/lib/python3.5/site-packages/msrest/pipeline/__init__.py", line 197, in run
    return first_node.send(pipeline_request, **kwargs)  # type: ignore
  File "/home/tommy/.local/lib/python3.5/site-packages/msrest/pipeline/__init__.py", line 150, in send
    response = self.next.send(request, **kwargs)
  File "/home/tommy/.local/lib/python3.5/site-packages/msrest/pipeline/requests.py", line 68, in send
    request.context.session = session = self._creds.signed_session()
  File "/home/tommy/.local/lib/python3.5/site-packages/azure/common/credentials.py", line 78, in signed_session
    return credentials.signed_session(session)
TypeError: signed_session() takes 1 positional argument but 2 were given