IndexError list index out of range when an empty AUTHORIZATION header is sent about djangorestframework-simplejwt

[dominicmarmont]

Stacktrace:

IndexError: list index out of range
  File "django/core/handlers/exception.py", line 34, in inner
    response = get_response(request)
  File "django/core/handlers/base.py", line 126, in _get_response
    response = self.process_exception_by_middleware(e, request)
  File "django/core/handlers/base.py", line 124, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "newrelic/hooks/framework_django.py", line 544, in wrapper
    return wrapped(*args, **kwargs)
  File "django/views/decorators/csrf.py", line 54, in wrapped_view
    return view_func(*args, **kwargs)
  File "django/views/generic/base.py", line 68, in view
    return self.dispatch(request, *args, **kwargs)
  File "newrelic/hooks/component_djangorestframework.py", line 46, in _nr_wrapper_APIView_dispatch_
    return wrapped(*args, **kwargs)
  File "rest_framework/views.py", line 495, in dispatch
    response = self.handle_exception(exc)
  File "newrelic/hooks/component_djangorestframework.py", line 53, in _handle_exception_wrapper
    return wrapped(*args, **kwargs)
  File "rest_framework/views.py", line 455, in handle_exception
    self.raise_uncaught_exception(exc)
  File "rest_framework/views.py", line 483, in dispatch
    self.initial(request, *args, **kwargs)
  File "rest_framework/views.py", line 400, in initial
    self.perform_authentication(request)
  File "rest_framework/views.py", line 326, in perform_authentication
    request.user
  File "rest_framework/request.py", line 223, in user
    self._authenticate()
  File "rest_framework/request.py", line 376, in _authenticate
    user_auth_tuple = authenticator.authenticate(self)
  File "rest_framework_simplejwt/authentication.py", line 35, in authenticate
    raw_token = self.get_raw_token(header)
  File "rest_framework_simplejwt/authentication.py", line 69, in get_raw_token
    if parts[0] not in AUTH_HEADER_TYPE_BYTES:

#56 should fix this issue.