The code is inside of a Task definition as shown below. The idea is to connect to GoogleSheets using the task (I realize there's one in the library already but our internal ones contain more specific functionality) :

from prefect import Task
from prefect.tasks.secrets import PrefectSecret
from prefect.utilities.tasks import defaults_from_attrs
from typing import Any, List

class ConnectToGoogleSheets(Task):
    def __init__(self, account_key: str = None, **kwargs: Any):
        self.account_key = account_key

        super().__init__(**kwargs)

    def run(self, **kwargs: Any):
        if not self.account_key:
            raise ValueError("The account key string must be provided")

        account_key_actual = PrefectSecret(self.account_key).run()
        
        print(type(account_key_actual))

        ....

There's more code in the task definition but the type that gets returned is Config.