Fix the fallback logic for getting the `SPACE_AUTHOR_NAME` when `user_hf_token` is not set

app.py

@@ -1,5 +1,6 @@
 import logging
 import subprocess
+import os
 import sys
 from dataclasses import dataclass
 from pathlib import Path
@@ -30,12 +31,13 @@ class Config:
     def from_env(cls) -> "Config":
         """Create config from environment variables and secrets."""
         system_token = st.secrets.get("HF_TOKEN")
-        user_token = st.session_state.get("user_hf_token", "")
-        hf_username = (
-            whoami(token=user_token)["name"]
-            or st.secrets.get("SPACE_AUTHOR_NAME")
-            or whoami(token=system_token)["name"]
-        )
+        user_token = st.session_state.get("user_hf_token")
+        if user_token:
+            hf_username = whoami(token=user_token)["name"]
+        else:
+            hf_username = (
+                os.getenv("SPACE_AUTHOR_NAME") or whoami(token=system_token)["name"]
+            )
         hf_token = user_token or system_token
 
         if not hf_token: