Registers the tenant and email combination for activation.

The api version to use

If specified, the client directs that the request is repeatable; that is, that the client can make the request multiple times with the same Repeatability-Request-Id and get back an appropriate response without the server executing the request multiple times. The value of the Repeatability-Request-Id is an opaque string representing a client-generated, globally unique for all time, identifier for the request. It is recommended to use version 4 (random) UUIDs.