Issue fixes

app.py

@@ -50,7 +50,7 @@ def get_aqi(city:str, state:str, country:str)-> str:
 
         response = requests.request("GET", url, headers=headers, data=payload)
 
-        data_json = response.json
+        data_json = response.json()
         if data_json.status == "success":
             return f"The current air quality in {city} is {data_json.current.pollution.aqius}."
         else: