Fix to only use NamedTuple fields from TautulliStream

* Allow new fields to be added to Tautulli API without breaking Varken

varken/tautulli.py

@@ -1,4 +1,5 @@
 from logging import getLogger
+from operator import itemgetter
 from requests import Session, Request
 from geoip2.errors import AddressNotFoundError
 from datetime import datetime, timezone, date, timedelta
@@ -40,8 +41,10 @@ class TautulliAPI(object):
             if session.get('_cache_time'):
                 del session['_cache_time']
 
+        fields = itemgetter(*TautulliStream._fields)
+        
         try:
-            sessions = [TautulliStream(**session) for session in get['sessions']]
+            sessions = [TautulliStream(*fields(session)) for session in get['sessions']]
         except TypeError as e:
             self.logger.error('TypeError has occurred : %s while creating TautulliStream structure', e)
             return