Update database.py

database.py

@@ -1,9 +1,12 @@
 from pymongo import MongoClient
+import os 
+
+CER_KEY = os.environ['cer']
 
 uri = "mongodb+srv://cluster0.tzvxqk3.mongodb.net/?authSource=%24external&authMechanism=MONGODB-X509&retryWrites=true&w=majority"
 client = MongoClient(uri,
                      tls=True,
-                     tlsCertificateKeyFile="X509-cert-2433626168795922546.pem")
+                     tlsCertificateKeyFile=CER_KEY)
 
 db = client['testDB']
 collection = db['testCol']