Importing a bunch of users from csv spreadsheet file into Drupal 8 I have a large csv spreadhseet list of users with name, email, phone and username. The passwords can be the same for all as they will be blocked anyway. 

I know there is an old tutorial of importing users via the migrate api in drupal 8 from here: http://www.metaltoad.com/blog/migrating-users-drupal-7-to-drupal-8

But that article is from 2014. Is there a new upto date way of doing this without the need to create a custom module? Is there a simple gui interface to get this imported? Or is there no choice but to make that custom migrate module?
Check out the Migrate Source CSV

I know that it uses drush and can import nodes through mapping it in a twig file and I'm pretty sure that it supports users too.

Full steps located here.