First you need to import users form your Question2answer site.
Generate CSV file form Question2answer site
First you need to generate CSV files from Question2answer site.
you will see the file
export-user.php under following directory on plugin.
Or Download from here
make a copy of this file on your Question2answer site. do not forget to change the database access information
$link = mysqli_connect("localhost", "demo_user", "demo_pass", "demo_database_name");
and then try to access your site this file
it will take time as your number of user. please wait until load completely and then save as CSV file
using phpMyAdmin you need to import this CSV file to “wp_users” table.