Correctly using secret key

tools/cheapest_flight.py

@@ -2,7 +2,7 @@ import http.client
 import pandas as pd
 import numpy as np
 import json
-from smolagents.tools import Tool
+import os
 
 
 
@@ -10,8 +10,10 @@ def get_flight(departureId, arrivalId, departureDate):
 
     conn = http.client.HTTPSConnection("booking-com15.p.rapidapi.com")
 
+    rapid_key = os.getenv("RAPIDAPI_KEY")
+
     headers = {
-        'x-rapidapi-key': "RAPIDAPI_KEY", #Replace with your own RapidAPI key
+        'x-rapidapi-key': rapid_key, #Replace with your own RapidAPI key
         'x-rapidapi-host': "booking-com15.p.rapidapi.com"
     }
 
@@ -55,7 +57,7 @@ def get_flight(departureId, arrivalId, departureDate):
                     cheapest_flight = offer
             except (ValueError, TypeError):
                 continue
-            
+
         # Extract relevant info from cheapest flight
         if cheapest_flight:
             try: