Fix updated behavior of st.query_params which no longer returns list

src/shared_page.py

@@ -22,8 +22,8 @@ def local_css():
 
 def login_token_arg_if_exists():
     url_params = st.query_params
-    if arg_token_list := url_params.get("token"):
-        login_by_token(arg_token_list[0])
+    if arg_token := url_params.get("token"):
+        login_by_token(arg_token)
 
 
 def common_page_config():