You can’t get all of this information from a single source. Regarding the User creation dates, you might be able to get this from the WebLogic export facility - https://www.oracle.com/webfolder/community/middleware/3687605.html
With regards to the user groups, you’ll need a WLST script and there are loads of examples online. Here’s one that Michael Verzijl put together sometime ago - https://mverzijl.wordpress.com/2012/08/23/weblogic-wlst-get-users-and-groups/amp/
Finally, to get the User dashboard privileges, you’ll need to get this out of a catalog manager report - https://docs.oracle.com/middleware/1221/biee/BIESG/prescatadmin.htm#BIESG317
look at section 16.9
As Joel said there isn't a single source for that, the database can only give you the users / groups / role part if you ask nicely. Everything else (Catalog permissions) must be asked to OBIEE directly.
As alternative to WLST you can also query the OPSS schema tables. It's less documented and require some "creativity" but can still be done...