         convenience init() {
         self.init(frame: CGRect.zero)
      
-         sv(
+         subviews(
             email,
             password,
             login

     
     - Returns: Itself to enable nested layouts.
     */
    @objc @discardableResult
    func sv(_ subViews: [UIView]) -> UIView {
        for sv in subViews {
            addSubview(sv)
            sv.translatesAutoresizingMaskIntoConstraints = false

     - Returns: Itself to enable nested layouts.
     */
    @discardableResult
    func subviews(@SubviewsBuilder content: () -> UIView) -> UIView {
        let subview = content()
        subviews(subview)
        return self
    }

