ALTER USER "YOUR USER" CREATEDB;

ALTER USER "YOUR USER" CREATEDB;

Output:
ALTER ROLE

See also

• ALTER, ALTER DATABASE, ALTER TABLE, ALTER DEFAULT PRIVILEGES, ALTER MATERIALIZED VIEW
• PostgreSQL: Database roles, CREATE USER, CREATE ROLE, \du, \du+, create user, Alter user
• GRANT, \ddp, GRANT USAGE, GRANT ALL PRIVILEGES, GRANT SELECT, View GRANTs on Redshift, has_table_privilege, has_schema_privilege, HAS_DATABASE_PRIVILEGE, SCHEMA, Privileges, GRANT EXECUTE