Hello,

Well... a few things here...

First, you are getting that because DNN supports different prefixes on tables based on who the DB owner is as well as object qualifiers in the case of custom modules.

Second, you probably don't want to interact with DNN's users table directly. Instead, it is very strongly recommended you use the API. If you use the DNN API, then you never need to worry about what the table is called. There are very few cases where you'd want something that directly works with the users table... they are usually just maintenance modules and the like.

Mike