code: public String getIdentityProvider() {
  		if (isFacebookUser()) {
  			return "facebook";
  		} else if (isGooglePlusUser()) {
  			return "google";
  		} else if (isGitHubUser()) {
  			return "github";
  		} else if (isTwitterUser()) {
  			return "twitter";
  		} else if (isLinkedInUser()) {
  			return "linkedin";
  		} else if (isMicrosoftUser()) {
  			return "microsoft";
  		} else if (isLDAPUser()) {
  			return "ldap";
  		} else if (isSAMLUser()) {
  			return "saml";
  		} else {
  			return "generic";
  		}
  	}
docs: Returns the name of the identity provider.
  @return "facebook", "google"... etc.