How to create/add bulk users in WorkSpace?

Hi Folks, 

I am curious to know the process/steps to created user or add users in ALM Octane WorkSpace. 

Is there a similar process that we do in ALM.net? 

Created users in SA > Add to project>Assign Role

Example For Octane: 

I have 20 users that I need to create their account in Octane, add them into A workspace and Assign Tester and Leader role. Those 20 users detail is in excel.

So, Can I use excel sheet to create/add users in ALM Octane WorkSpace? Similar to ALM.net.

Note: My authentication Method is Internal.

Please suggest.