How to invite Facebook friends on bubble page

Hello Guys,I want to know how can we invite facebook friends to our bubble page and also i want to know how to do sign up with facebook

Can you expound more on this? Do you want to simply redirect your friends to your bubble app or do you want to do it programmatically?

You can use Facebook Oauth. There are plugins for this or you can also do it yourself

I am creating reading challenge page…and I want to invite current users facebook friends to accept reading challenge…