Tip of the day via Vish Raparthi. Thanks, Vish!

Are you doing something like creating and/or querying a site or user on Tableau with the REST API? Running into unexplainable 400 errors? 

Make sure that you’re properly encoding any special symbols like  ’ :

Russell’s Site 

O’ReilyUserName

Many tools & libraries will take care of this encoding for you (Postman, for example). However some libraries don’t. If this is the case, you may need to replace your single-quote symbol (or any other offensive character) with something like ' or other appropriate stand-in.