Create a tenant and email its first administrator a link that opens it.
Signing in
Create a tenant and email its first administrator a link that opens it.
Returns the same row api.sign_in does. Where the deployment confirms addresses, which is the default, the row carries no token and the outcome CONFIRMATION_SENT: the organisation exists but nobody can sign in to it until the link is opened with api.confirm_sign_up. Addresses at temporary-inbox services are refused as DISPOSABLE_EMAIL. Refused on a tenant’s own hostname, where the form would be misleading.

