We have around 10 websites. I have been asked to create a functionality similar to Login using Facebook which now a days all websites are using, so that we do not need to register with them. We can use facebook credantials.
So out of our 10 websites we have 1 main website e.g. called abc.com(e-commerece website running on MAGENTO) . I want to put a button on other 9 websites login page called login using abc.com
how could I do that. I have checked on OAuth and MAGENTO’s REST OAuth. Because I’m not that experienced so would like to have some ideas or anything else you have used. What would be the right way of doing that?
openID suggested by David in comments