error handling

app.py

@@ -5,6 +5,10 @@ DEMO_SERVER = "4.208.9.167:80"
 
 def run_query( prompt):
     POLICY = "./cce_policy.txt"
+    if prompt != True:
+        return("⛔ Error: invalid user input for query")
+    if prompt.len() == 0:
+        return("⛔ Error: please add your query for automated code completion")
     try:
         with SecureSession(f"http://{DEMO_SERVER}", POLICY) as secure_session:
             res = secure_session.post(endpoint="/generate", json={"input_text": prompt})