User access , privilege related tables

Summary

Looking for tables which can give the details of user access , privileges added or removed related info and modified by whom

Content

Looking for tables which can give the details of user access , privileges added or removed related info and modified by whom related information. I have to build a BI report which should give me the details about user access added or removed on a week period of time and by whom the modification has made . Could you please help me with the tables names.