title: How to check all roles/user/group_role have what privileges in postgres database?
body: <p>I have postgres database.
  I want the list of users with access privileges they are being assigned.</p>
  
  <p>I tried to find query and also looked in to psql command line help. (\nu and all) but I haven't found any usefull information.</p>
  
  <p>Is anyone knows about that can help me out.</p>
  
  <p>Thanks.</p>