Make two plugins use the same user login

Hi,

I’m building a real estate website. I would like to offer visitors the option of listing properties and also an auction option. I’ve singled out buzztarget for the property listings and woocommerce simple auctions for the auction functionality. Thing is, they both come with their own user login. Can I have a single point of entry for the user and then choose listings or auction from the sidebar?

Would really appreciate any and all help. 🙂

Thanks.