Synopsis
Use the CREATE USER statement to create a user. The CREATE USER statement is an alias for CREATE ROLE, but creates a role that has LOGIN privileges by default.
Syntax
create_user ::= CREATE USER role_name 
                [ [ WITH ] role_option [ , ... ] ]
role_option ::= SUPERUSER
                | NOSUPERUSER
                | CREATEDB
                | NOCREATEDB
                | CREATEROLE
                | NOCREATEROLE
                | INHERIT
                | NOINHERIT
                | LOGIN
                | NOLOGIN
                | CONNECTION LIMIT connlimit
                | [ ENCRYPTED ] PASSWORD  ' password ' 
                | PASSWORD NULL
                | VALID UNTIL  ' timestamp ' 
                | IN ROLE role_name [ , ... ]
                | IN GROUP role_name [ , ... ]
                | ROLE role_name [ , ... ]
                | ADMIN role_name [ , ... ]
                | USER role_name [ , ... ]
                | SYSID uid
Semantics
See CREATE ROLE for more details.
Examples
- Create a sample user with password.
 
yugabyte=# CREATE USER John WITH PASSWORD 'password';
- Grant John all permissions on the 
yugabytedatabase. 
yugabyte=# GRANT ALL ON DATABASE yugabyte TO John;
- Remove John's permissions from the 
yugabytedatabase. 
yugabyte=# REVOKE ALL ON DATABASE yugabyte FROM John;