Untitled

add_action('b2bking_b2bcustomers_column_header', function(){
	?>
	<th><?php esc_html_e('Test','b2bking'); ?></th>
	<?php
});

add_filter('b2bking_b2bcustomers_row_content', function($content, $user){
	return $content.'<td>test1234</td>';
}, 10, 2);

add_action('b2bking_b2bcustomers_column_footer', function(){
	?>
	<th><?php esc_html_e('Test Footer','b2bking'); ?></th>
	<?php
});