pg_user
   The view pg_user provides access to
   information about database users.  This is simply a publicly
   readable view of
   pg_shadow
   that blanks out the password field.
  
Table 51.94. pg_user Columns
| Name | Type | Description | 
|---|---|---|
| usename | name | User name | 
| usesysid | oid | ID of this user | 
| usecreatedb | bool | User can create databases | 
| usesuper | bool | User is a superuser | 
| userepl | bool | User can initiate streaming replication and put the system in and out of backup mode. | 
| usebypassrls | bool | User bypasses every row level security policy, see Section 5.8 for more information. | 
| passwd | text | Not the password (always reads as ********) | 
| valuntil | timestamptz | Password expiry time (only used for password authentication) | 
| useconfig | text[] | Session defaults for run-time configuration variables |