         logoView.contentMode = UIViewContentMode.center
         logoView.image = #imageLiteral(resourceName: "assetGenericLogo")
         
-//        let loginButton;
+        let loginButton:FBSDKLoginButton = FBSDKLoginButton()
+        loginButton.translatesAutoresizingMaskIntoConstraints = false
         
         addSubview(logoView)
+        addSubview(loginButton)
         
         let views:[String:UIView] = [
-            "logoView":logoView]
+            "logoView":logoView,
+            "loginButton":loginButton]
         
         let metrics:[String:CGFloat] = [:]
         

import UIKit
import FirebaseAuth

class VLogin:UIView
{

            options:[],
            metrics:metrics,
            views:views))
        addConstraints(NSLayoutConstraint.constraints(
            withVisualFormat:"H:|-0-[loginButton]-0-|",
            options:[],
            metrics:metrics,
            views:views))
        addConstraints(NSLayoutConstraint.constraints(
            withVisualFormat:"V:[loginButton(40)]-10-|",
            options:[],
            metrics:metrics,
            views:views))
    }
}
