Maximum length of the join_url string returned by the API call webinarRegistrantCreate?

We want to store the join_url so participants can get their link from our website, this is a simple question but I couldn't find the answer:

What's the maximum length of the join_url string returned by API call webinarRegistrantCreate? (ref https://marketplace.zoom.us/docs/api-reference/zoom-api/methods/#operation/webinarRegistrantCreate)

I want to know this so I can create the correctly sized field in the database!

Thanks!