Update player.py

player.py

@@ -5,7 +5,7 @@ import json
 token = ""
 source_dataset = "jbilcke-hf/ai-tube-index"
 api = HfApi(token=token)
-def find_dataset(author=None):
+def find_dataset(author=""):
     s_ist = (api.list_datasets(author=author,search="ai-tube"))
     #print(api.whoami())
     channels=[]