Pass the HfApi object in notebook_login when logging in with a token (#519)

Author: anton-l

src/huggingface_hub/commands/user.py

@@ -379,7 +379,7 @@ def login_token_event(t):
         # Erase token and clear value to make sure it's not saved in the notebook.
         token_widget.value = ""
         clear_output()
-        _login(token=token)
+        _login(HfApi(), token=token)
 
     token_finish_button.on_click(login_token_event)