Argon2 errors with NixOS config

No matter what I type in, I get the 'nah dude' error.

```
services.copyparty.globalExtraConfig = ''
ah-alg: argon2
ah-salt "xxx"
'';
```

With the salt "xxx" I hash the password,

```
nix run github:9001/copyparty#copyparty -- --ah-alg argon2 --ah-gen 'autumni:pissoff' --ah-salt 'xxx'
```

Then load it from a file...

```
accounts = {
autumni.passwordFile = "/etc/nixos/secrets/autumnspass";
(...)
};
```