Desperately need to remove all 1500 members from my Weebly site

Weebly only allows you to remove each individual member, meaning you need to click the tiny gear, click remove, and click okay. This is a nightmare for someone who simply needs to remove all members.

Is there anyone that knows a way to remove them all without clicking each one? If I'm being honest, this seems like complete and total incompetence from Weebly. They've improved in some ways, but their product has not been good at all over the years. Very infuriating.