Initializes the login providers.

var result = SocialLogin.init({
    googleServerClientId: "<YOUR-CLIENT-ID-HERE>",  // optional
});

console.log("Facebook isInitialized? " + result.facebook.isInitialized);
if (result.facebook.error) {
    console.log("Facebook error: " + result.facebook.error);
}

console.log("Google isInitialized? " + result.google.isInitialized);
if (result.google.error) {
    console.log("Google error: " + result.google.error);
}