We do not have any built in functionality to facilitate a mass import of users. If you want to have such implementation you would need to create a custom control that would allow you to read through the CSV file and add the users via the API. For the taxonomies (classifications) you can find the hierarchical API
and the flat API
. The documentation for our users API could be found here.
We have already had an example of it being done with Ecommerce products so you can take a look at the code for that on Git to get started.
You might find it useful.
All the best,
the Telerik team
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