add parameter required for OAuth over HTTPS

purist/custom.py

@@ -27,7 +27,8 @@ class AuthenticationBackend(BaseBackend):
                 consumer_key=settings.WOO_CONSUMER_KEY,
                 consumer_secret=settings.WOO_CONSUMER_SECRET,
                 wp_api=True,
-                version="jwt-auth/v1",
+                version="jwt-auth/v1",  # required for JWT Authentication
+                query_string_auth=True,  # required for OAuth over HTTPS
             )
 
             jwt_response = jwt_wcapi.post("token", {"username": username, "password": password})