Create a new user. This will create a new user without access to SiriDB. For more information on how to grant access to a user see grant access.
create user 'my-username' set password 'my-password'
# This will create a new user 'iris' with password 'siri'
create user 'iris' set password 'siri'
# Grant "read" access to "iris"
grant read to user "iris"