--license-type parameter needs an explanation

The "--license-type" Shows the list of accepted values (advanced, earlyAdopter, express, professional, stakeholder). But, there's no explanation of what these values are.
These names don't match up with the Azure DevOps doc:
https://docs.microsoft.com/en-us/azure/devops/organizations/security/access-levels?view=azure-devops

express = Basic
advanced = Basic + Test
stakeholder = Stakeholder
professional = Does this assign a Visual Studio Pro license from a pool of available licenses?

How do you add a that has a "Visual Studio Subscriber?

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* ID: c84e9b38-b9da-f69f-c9d7-b0c1a1e8683a
* Version Independent ID: bfd383ce-2ee6-64ec-8ff6-a4e8c88fd516
* Content: [az devops user](https://docs.microsoft.com/en-us/cli/azure/ext/azure-devops/devops/user?view=azure-cli-latest#ext-azure-devops-az-devops-user-add)
* Content Source: [latest/docs-ref-autogen/ext/azure-devops/devops/user.yml](https://github.com/MicrosoftDocs/azure-docs-cli/blob/live/latest/docs-ref-autogen/ext/azure-devops/devops/user.yml)
* GitHub Login: @rloutlaw
* Microsoft Alias: **routlaw**