Update src/app.py

src/app.py

@@ -41,18 +41,25 @@ def log_activity(user, action, query, search_type):
         pass
 
 # ==============================
-# AUTHENTICATION (MULTI USER)
+# AUTHENTICATION
 # ==============================
 def login():
     st.title("🔐 Multi-User Login")
 
     users_json = os.environ.get("USERS") or st.secrets.get("USERS")
 
-    if not users_json:
+    # ✅ FIX 1: Empty check
+    if not users_json or str(users_json).strip() == "":
         st.error("⚠️ USERS not configured in Hugging Face secrets!")
-        return
+        st.stop()
 
-    users = json.loads(users_json)
+    # ✅ FIX 2: JSON validation
+    try:
+        users = json.loads(users_json)
+    except Exception:
+        st.error("❌ Invalid USERS JSON format!")
+        st.code(users_json)
+        st.stop()
 
     username = st.text_input("Username")
     password = st.text_input("Password", type="password")
@@ -70,6 +77,7 @@ def login():
             log_activity(username, "Login Failed", "-", "-")
             st.error("❌ Invalid credentials")
 
+# Session control
 if "authenticated" not in st.session_state:
     st.session_state["authenticated"] = False
 
@@ -78,7 +86,7 @@ if not st.session_state["authenticated"]:
     st.stop()
 
 # ==============================
-# PAGE CONFIG
+# UI
 # ==============================
 st.set_page_config(page_title="Multi Search Engine", layout="wide")
 st.title("🔍 Advanced Multi-Search Product Engine")