`gmail.get_messages` Is Really Slow

It takes like 17 seconds to fetch six emails from the last three months, and anything in the span of a year gives me a `RecursionError`.

```py
gmail = Gmail()
query_params = {
    "newer_than": (3, "month"),
}
messages = gmail.get_messages(query=construct_query(query_params))
```

Am I doing something wrong?