Remove dependency on system variables

app.py

@@ -1,5 +1,4 @@
 import logging
-import os
 import subprocess
 import sys
 from dataclasses import dataclass
@@ -8,7 +7,7 @@ from typing import Optional, Tuple
 from urllib.request import urlopen, urlretrieve
 
 import streamlit as st
-from huggingface_hub import whoami, HfApi
+from huggingface_hub import HfApi, whoami
 
 logging.basicConfig(level=logging.INFO)
 logger = logging.getLogger(__name__)
@@ -30,11 +29,11 @@ class Config:
     @classmethod
     def from_env(cls) -> "Config":
         """Create config from environment variables and secrets."""
-        system_token = st.secrets.get("HF_TOKEN") or os.getenv("HF_TOKEN", "")
+        system_token = st.secrets.get("HF_TOKEN")
         user_token = st.session_state.get("user_hf_token", "")
         hf_username = (
             whoami(token=user_token)["name"]
-            or os.getenv("SPACE_AUTHOR_NAME")
+            or st.secrets.get("SPACE_AUTHOR_NAME")
             or whoami(token=system_token)["name"]
         )
         hf_token = user_token or system_token