Update app.py

app.py

@@ -12,7 +12,6 @@ import requests
 import uuid
 import base64
 import io
-from huggingface_hub import HfApi
 from werkzeug.security import generate_password_hash, check_password_hash
 
 from dotenv import load_dotenv
@@ -26,7 +25,15 @@ CORS(app, resources={r"/*": {"origins": "*"}}, supports_credentials=True)
 HF_TOKEN = os.environ.get("HF_TOKEN", "").strip()
 HF_USER_DATA_REPO = os.environ.get("HF_USER_DATA_REPO", "").strip()
 HF_USER_DATA_PATH = os.environ.get("HF_USER_DATA_PATH", "users.json").strip() or "users.json"
-hf_api = HfApi(token=HF_TOKEN) if HF_TOKEN else None
+hf_api = None
+
+
+def get_hf_api():
+    global hf_api
+    if hf_api is None and HF_TOKEN:
+        from huggingface_hub import HfApi
+        hf_api = HfApi(token=HF_TOKEN)
+    return hf_api
 
 ## ── SECRETS ──────────────────────────────────────────────────────────────────
 # Pull keys from environment variables for secure web deployment
@@ -75,11 +82,12 @@ def _base_users_payload():
 
 
 def load_users_from_hf():
-    if not hf_api or not HF_USER_DATA_REPO:
+    api = get_hf_api()
+    if not api or not HF_USER_DATA_REPO:
         raise RuntimeError("Hugging Face is not configured. Set HF_TOKEN and HF_USER_DATA_REPO.")
 
     try:
-        downloaded_path = hf_api.hf_hub_download(
+        downloaded_path = api.hf_hub_download(
             repo_id=HF_USER_DATA_REPO,
             filename=HF_USER_DATA_PATH,
             repo_type="dataset",
@@ -106,7 +114,8 @@ def load_users_from_hf():
 
 
 def save_users_to_hf(payload, commit_message):
-    if not hf_api or not HF_USER_DATA_REPO:
+    api = get_hf_api()
+    if not api or not HF_USER_DATA_REPO:
         raise RuntimeError("Hugging Face is not configured. Set HF_TOKEN and HF_USER_DATA_REPO.")
 
     with tempfile.NamedTemporaryFile("w", suffix=".json", delete=False, encoding="utf-8") as temp_file:
@@ -114,7 +123,7 @@ def save_users_to_hf(payload, commit_message):
         temp_file_path = temp_file.name
 
     try:
-        hf_api.upload_file(
+        api.upload_file(
             path_or_fileobj=temp_file_path,
             path_in_repo=HF_USER_DATA_PATH,
             repo_id=HF_USER_DATA_REPO,