Update app.py

app.py

@@ -17,7 +17,7 @@ def web_search(arg1:str)-> str: #it's import to specify the return type
         arg1: the first argument
         arg2: the second argument
     """
-    client = TavilyClient("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")
+    client = TavilyClient("API_Key")
     response = client.search(arg1)
     return(response)