The createUser command.
(createUserCommand: StringAdd).self
(createUserCommand: StringFormat).self
(createUserCommand: ArrowAssoc[CreateUserCommand[P]]).x
(Since version 2.10.0) Use leftOfArrow
instead
(createUserCommand: Ensuring[CreateUserCommand[P]]).x
(Since version 2.10.0) Use resultOfEnsuring
instead
(Since version 0.16.0) Internal: will be made private