Added note on Caching

docs/client.md

@@ -75,3 +75,8 @@ For more information on launching parallel tasks with python refer to
 [the official documentation].
 
 [the official documentation]: https://docs.python.org/3/library/concurrent.futures.html
+
+## Caching
+The Client uses caching internally. Sometimes you may run into cache consistency issues.  
+To clear the cache use:  
+`ApiClient.session.cache.clear()`