private void btnCriarConta_Click(object sender, EventArgs e)
 {
     if (txtUser.Text == user && txtPassword.Text == password)
     {
         Cadastro C = new Cadastro();
         C.Show();
         this.Show();
     }
     else
     {
         MessageBox.Show(Helpers.Helper.EPassword());
         btnOk.Enabled         = false;
         btnRPassword.Visible  = true;
         btnCriarConta.Enabled = false;
     }
 }