How to use ftps?

[Akruidenberg]

I've been testing this docker image with some test volumes and this is working fine so far with a local backup folder.
However, i would like to setup another job with FTPS, but I don't get it working.
Volumerize won't connect with my FritzBox. When searching for the docs for Duplicity, it looks like I need to fill in a env. See:

http://duplicity.nongnu.org/docs.html

However, i don't know where to put this password in duplicity. Duplicati is working fine with my Fritzbox, that's not the problem.
I; ve tried the following for the VOLUMERIZE_TARGET parameter:

ftps://user:secretpassword@example.example.com:port/duplicity

What is the right configuration to use volumerize with ftps?

[sargreal]

You should only have to add the environment variable as FTP_PASSWORD.

Volumerize forwards all non-defined variables to duplicity.

If you want or need it, i can also add it to the variables that can be used as docker secrets

[Akruidenberg]

FTP_PASSWORD

Thank you for your answer. From a security standpoint, it would be nice to have. :)