Update app.py

app.py

@@ -50,7 +50,7 @@ def get_nus_bus_arrival(bus_stop_code):
         'Connection': 'keep-alive',
         'Accept': 'application/json',
         'User-Agent': 'nusnextbusv2/1 CFNetwork/978.0.7 Darwin/18.7.0',
-        'Authorization': 'Basic TlVTbmV4dGJ1czoxM2RMP3pZLDNmZVdSXiJU',
+        'Authorization': nextbus_token,
         'Accept-Language': 'en-us',
         'Accept-Encoding': 'br, gzip, deflate'
     }