GRANT ALL PRIVILEGES ON DATABASE

psql -h you_dp_ip -U postgres -p 5432  << EOF
CREATE DATABASE "yourdbname";
CREATE USER yourusername WITH PASSWORD yourpassword;
GRANT ALL PRIVILEGES ON DATABASE "yourdbname" to yourusername;
GRANT ALL PRIVILEGES ON SCHEMA public to yourusername;
GRANT ALL PRIVILEGES ON ALL TABLES IN SCHEMA public TO yourdbname;
EOF

See also

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