acquire site id

app.py

@@ -47,13 +47,20 @@ def send_webhook(device, status, diagnostics):
 class UnifiAPI:
     def __init__(self, config):
         self.base_url = config['unifi']['controller']
-        self.site_id = "default"
         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()
+
+    def get_site_id(self):
+        url = f"{self.base_url}/proxy/network/api/self/sites"
+        response = self.session.get(url, headers=self.headers)
+        response.raise_for_status()
+        sites = response.json()['data']
+        return sites[0]['_id']
 
     def get_all_devices(self):
         url = f"{self.base_url}/integration/v1/sites/{self.site_id}/devices"