Password authentication is required for packages uploading. Passwords
are dynamically changed through the FIFO file. You have to create it
and use in -passwd option. Optionally, to list currently present logins
use another FIFO and -passwd-list option:

    $ mkfifo passwd passwd-list
    $ gocheese -passwd passwd -passwd-list passwd-list ...

Then you must feed it newline-separated records in following format:

    username:hashed-password[:ro]

Where hashed-password is in one of following algorithms:

* Argon2i (recommended one!)
  => https://www.argon2i.com/
  To get Argon2i hashed-password you can use any of following tools:
  => https://github.com/balakhonova/argon2i
  => https://github.com/p-h-c/phc-winner-argon2
  Example user "foo" with password "bar" can have the following password
  file entry:

    foo:$argon2i$v=19$m=32768,t=3,p=4$OGU5MTM3YjVlYzQwZjhkZA$rVn53v6Ckpf7WH0676ZQLr9Hbm6VH3YnL6I9ONJcIIU

* SHA256. You can use your operating system tools:

    $ echo -n "password" | `command -v sha256 || echo sha256sum`

  Example user "foo" with password "bar" will have the following password
  file entry:

    foo:$sha256$fcde2b2edba56bf408601fb721fe9b5c338d10ee429ea04fae5511b68fbf8fb9

Optional ":ro" flag forbids user to upload packages, but allows read-only
access if -auth-required is enabled.

To add or update password entry:

    $ echo foo:$sha256$... >passwd
    $ cat passwords.txt >passwd

To delete login entry use empty password:

    $ echo foo: >passwd

You can also check you passwords file with:

    $ gocheese -passwd-check <passwords.txt
    $ echo $?