unclear schema for `created_at__range` parameters

Hi,
I'm trying to use the

https://cloud.getdbt.com/api/v2/accounts/{account_id}/runs/

API to retrieve a list of runs.

I want to pass the `created_at__range` query parameter, but [the documentation](https://github.com/dbt-labs/dbt-cloud-openapi-spec/blob/master/openapi-v2.yaml#LL1742C4-L1742C4) is not clear on what the expected format is (it only says `array`). Could you give me an example of how to pass that parameter to filter runs from say May 1st to June 1st of 2023?

thanks