"Pro" plan trial, as a developer

Hello,

I'm a developer and my client want to auth record meetings and upload them to AWS.
To do that, as a developer, I need first to test it on my local machine or dev server, before going to production and telling my client to purchase the "Pro" plan.

So, how can I get a free trial for the "Pro" plan, to test it and show my client that everything is working, before he purchases the "Pro" plan?

Thanks.