Some fixes

1. API should be declared outside try block or it won't be seen by finally

```python
api = UptimeKumaApi(BASE_URL)

try:
...
```

2. It should ignore inactive monitors

```python
    monitor_total = 0;
...
    for monitor in monitor_list:
        if not monitor['active']:
            continue
...
        monitor_list_string.append(text)
        monitor_total+=1
```