Linking Registration Login to Paid Spaces in Fluent Community

I’m using Fluent Forms for community registration, which requires subscribers to create a username and password. Once they enter the Fluent Community, they can choose which spaces they want to join/pay for. I’m using a Square integration via Paymattic for payments.

My question is:

• Can I link a subscriber’s username and password from the Fluent Forms registration to the specific space they pay for, or do they need to create a separate login for each space they join?
• Essentially, does Fluent Forms communicate directly with Paymattic/Square to control access to paid spaces, or is there a workaround for this?

Thanks in advance for any guidance!