If your app uses Auth0 for authenticating users, adding SSO with LinkedIn, PayPal, GitHub, Twitter and Facebook is just a click away:

SSO LinkedIn PayPal Twitter Facebook

Each provider configuration page will allow you to fine tune the information you'd like your customers to disclose. As an example, when selecting PayPal you can choose to request:

SSO PayPal

Facebook is particularly prolific in profile scopes, but we've added explanations to each one to help you choose the right ones:

SSO PayPal

Registration of apps with each of these providers is different and sometimes difficult to find online. We've documented all of them, accesible right from each configuration screen:

SSO GitHub

Here's a list for your reference:

Finally, the Auth0 Login Widget will show the new connections if you enable them:

SSO social login widget

Try Auth0 yourself!