Adding the modern theme login popup link in menu

<script>
jQuery(document).ready(function($){
   $('.login_trig').click(function(){
 	$('body').find('#login_trigger').trigger('click');
   });
 });
</script>

For modern theme 2.0 or greater :

<script>
jQuery(document).ready(function($){
   $('.login_trig').click(function(){
 	$('body').find('#login_modern_trigger').trigger('click');
   });
 });
</script>

2. Now goto appearance  -> menu .Add a custom link .
Put the class ” login_trig ” and href  ” #login ” .

To open popup on a button click :

a. Please provide ” login_trig ” class to the button :
You can add the button with the help of button shortcode :

LOG IN

3. Please add the given code in wplms-customizer.php file in wplms customizer plugin  :

add_action('wp_footer','hide_login');
function hide_login(){
 if(is_user_logged_in()) 
echo '
 <style>.login_trig{display:none !important;}</style>
 ';
}