Running http requests in functions

Future<void> sendFeeNotification(
      String token, String lang, String amount) async {
    try {
      const String url = "https://fcm.googleapis.com/v1/projects/$projectName/messages:send";

      // Create the notification payload
      Map<String, dynamic> notificationPayload = {
        "message": {
          "token": token,
          "notification": {
            "title": lang == 'en'
                ? 'A new pending fee has been added to your account for $amount'
                : 'Une nouvelle redevance en attente a été ajoutée à votre compte pour $amount',
            "body": lang == 'en'
                ? 'Please check your account for more details'
                : 'Veuillez vérifier votre compte pour plus de détails',
          },
        }
      };

      try {
        print('Sending notification...');
        print(serverKey);
        
        //when it gets here nothing happens
        final response = await http.post(
          Uri.parse(url),
          headers: {
            "Content-Type": "application/json",
            "Authorization": "Bearer $serverKey",
          },
          body: jsonEncode(notificationPayload),
        );

        print('Response: ${response.body}');

        if (response.statusCode == 200) {
          print('Notification sent successfully');
          
        } else {
          print('Failed to send notification: ${response.body}');
          
        }
      } catch (e) {
        print('Error sending notification: $e');
        
      }
    } catch (e) {
      print('Error sending notification: $e');
      
    }
  }