immuadmin ignores --tokenfile

[mabmayer]

What happened
In immudb container, immuadmin is bundled. Tried to use that with kubectl exec, but same error should also be visible with docker exec. When logging in, immuadmin tries to write the tokenfile. This fails, since home directory not writeable in that container. Trying to specify an alternate location with --tokenfile fails, since this parameter is somehwo ignored.

What you expected to happen
Being able to set the location of the tokenfile

How to reproduce it (as minimally and precisely as possible)
Run immudb container. Use docker/kubectl exec to launch immuadmin inside the container and try to log in.

Additional info (any other context about the problem)
We should also think about creating a home directory for the immu user in the container, so that immuadmin is usable in a sane way.