initializes the session before attempting to use it

app.py

@@ -47,13 +47,13 @@ def send_webhook(device, status, diagnostics):
 class UnifiAPI:
     def __init__(self, config):
         self.base_url = config['unifi']['controller']
+        self.session = requests.Session()
+        self.session.verify = False
         self.headers = {
             'X-API-KEY': config['unifi']['api_key'],
             'Accept': 'application/json'
         }
         self.site_id = self._get_site_id()
-        self.session = requests.Session()
-        self.session.verify = False
 
     def _get_site_id(self):
         url = f"{self.base_url}/proxy/network/integration/v1/sites"