Ajax Call And pass data to js file

// ajax used in front end
add_action( 'init', 'dsm_script_enquer');
function dsm_script_enquer() {
    wp_register_script( "dsm_js_front", get_template_directory_uri().'/js/main.js', array('jquery') );
    wp_localize_script( 'dsm_js_front', 'dsmAjax', 
                        array( 
                            'ajaxurl' => admin_url( 'admin-ajax.php' ),
                            'ajax_nonce' => wp_create_nonce('ajax_csrf_check'),  
                        ));
    wp_enqueue_script( 'dsm_js_front' );
    // wp_enqueue_script( 'jquery' );
}

add_action( 'wp_ajax_dsmGetCustomPostTypes', 'dsmGetCustomPostTypes' );
function dsmGetCustomPostTypes() {  
    ob_clean();           //TO CLEAN EXTRA SPACE

	$class_id = $_POST["class_id"];
	$security = $_POST["security"];
	// print_r($security); //cefd6888dc
    if(check_ajax_referer( 'ajax_csrf_check', 'security' ) ){
        $user_id = get_current_user_id(); 
        global $wpdb;
        // check this address is his or not
		$data = [];
        $admin_post_types = $wpdb->prefix . 'dsm_custom_post_types';
		$post_type = $wpdb->get_results( "SELECT * FROM $admin_post_types WHERE class_id = '".$class_id."'");
			foreach($post_type as $type)
			{
				$single_data = [];
				$single_data["post_type_slug"] = $type->post_type_slug;
				$single_data["post_type_name"] = $type->post_type_name;
				$single_data["id"] = $type->id;

				array_push($data, $single_data);
				     
			}
			echo json_encode($data); 
    }else{
        echo 'csrfAttack';
    }        
    wp_die(); // this is required to terminate immediately and return a proper response
}