Placeholder for password in invitation-email

Hi Forum,
I’m new at ROCKET.CHAT.
Would like to use Rocket.chat for private.groups only.
So, I disable the Register-form and invite users with invite-email.

All works fine - only the Placeholder [password] does not preg_preplace the placeholder like in Line 18 I would expect https://github.com/RocketChat/Rocket.Chat/blob/develop/packages/rocketchat-lib/lib/placeholders.js#L18

Questions

  • Is there a list for all usable placeholder in email?
    Tried [password], [Password], [passwort] and [Passwort]. All of them are not replaced with the users password. Have also tried with manual password set and «by chance».

  • If the [password] is not usable, is there a work around to invite users to private groups and send them the password?

Would be great to get a helping hand.
Thanks Martin