Problem: Can't create initial admin account within the UI

[weex]

Acropolis installation doesn't create any accounts by default. It must be done as a separate step first from the UI, then by promoting the created account from the command line.

This is a problem which becomes more important for platforms (like Yunohost) and users that prefer not to encourage direct command-line access.

Potential solution: Make the first account that is created an admin by default.

[weex]

YunoHost installs now create admin account via install script so this is less urgent. If we can document how to create the admin account from command line that's probably good enough for now.