I have a use case where I'm provisioning a sandbox as a building block composition. Since this composition is workspace-level BB, i cannot receive a user_permissions input (these are only support for tenant-level BBs).

Since my composition is actually creating a project and a tenant, it would be so cool if it could indeed have an input that gave me the details of the user that did request the BB. This way I could automatically set up the correct project bindings for the user.