Sorry the reply so late but that’s the first search result for “get list of all users discourse”…
You can implement read-only endpoints with the Data Explorer plugin.
- Install the plugin
- Create your query, with inputs if needed
- Issue a POST request on
/admin/plugins/explorer/queries/[id]/run(with[id]being your query ID)
You can also implement paging with limit/offset inputs I guess, but never tried.
For example, I’m using it to check if a given OAuth user ID is already registered on my instance through discourse-oauth2-basic.