Need to install Facebook SDK from NuGet packages.
In StartUp File
app.UseFacebookAuthentication(new FacebookAuthenticationOptions
{
AppId = "XXXXXXXXXX",
AppSecret = "XXXXXXXXXX",
Scope...
Twitter external login using oauth returns null email
For getting twitter user email using oauth external login we need to getting the Twitter support to allow the permission on our app.
Please refer this link : Get user’s email address from twitter OAuth API in .Net applications...
