Retrieving all users
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 I’m not seeing an explicit POST /api/user/searchthat will return all users - if i pass a queryString of*will I, in fact, get all users?
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 From the user search docs, for the database search engine: Regular expressions may not be used. A value of * will match all records. For the elasticsearch search engine, you are limited to 10,000 records returned due to this bug: https://github.com/FusionAuth/fusionauth-issues/issues/494 Here's docs on how to switch between them: https://fusionauth.io/docs/v1/tech/tutorials/switch-search-engines 
