Add missing headers to request

mytrix.py

@@ -53,7 +53,7 @@ class Matrix:
 
         headers = {"Authorization": "Bearer %s" % (self.access_token,)}
 
-        res = method(url, json=json_data)
+        res = method(url, json=json_data, headers=headers)
         return res.json()
 
     def _put(self, endpoint, query_data=None, json_data=None):