Attempt json loads on the private key in hf

src/login.py

@@ -1,4 +1,5 @@
 import hmac
+import json
 import streamlit as st
 from streamlit_gsheets import GSheetsConnection
 from streamlit.runtime.secrets import AttrDict, secrets_singleton
@@ -17,7 +18,15 @@ class HFFriendlyGSheetsConnection(GSheetsConnection):
         """
         connections_section = None
         if secrets_singleton.load_if_toml_exists():
-            connections_section = secrets_singleton
+            connections_section = AttrDict(secrets_singleton)
+
+        # in hf env the private key may need json loads
+        private_key = connections_section["private_key"]
+        try:
+            private_key = json.loads(private_key)
+            connections_section["private_key"] = private_key
+        except Exception:
+            pass
 
         return AttrDict(connections_section)