`Error: user not found` when calling soft-serve from remote

[joshuali925]

Describe the bug
After creating a user, I can call info successfully on the server that runs soft-serve, but when calling it from a remote host, I get Error: user not found

To Reproduce
Steps to reproduce the behavior:
On server A:

1. start soft-serve using docker

services:
  soft-serve:
    image: charmcli/soft-serve:latest
    container_name: soft-serve
    volumes:
      - ./data:/soft-serve
    ports:
      - 2222:23231
      - 23232:23232
      - 23233:23233
      - 9418:9418
    env_file:
      - .env
    restart: unless-stopped

2. validate admin works

❯ ssh localhost -p 2222 info
Username: admin
Admin: true
Public keys:
  ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIEizP6Nzr/jw05DLDYEdOeWOraXzHrBcuJAc8+jjx7Bw

3. create test user and validate

❯ ssh-keygen -t ed25519 -C '' -N '' -f ./id_ed25519
❯ ssh localhost -p 2222 user create mytest "-k '$(cat id_ed25519.pub)'"

# using server A's IP instead of `localhost` works as well
❯ ssh localhost -p 2222 -i id_ed25519 info
Username: mytest
Admin: false
Public keys:
  ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIKaWLByd3F0dZJXk5t+zMpLVDra0s5x1YsPE52B5Vs0+

On server B:

1. validate connection works

❯ ssh <server-A-ip> -p 2222 help
Soft Serve is a self-hostable Git server for the command line.

Usage:
  ssh -p 23231 localhost [command]

Available Commands:
  help                 Help about any command
  info                 Show your info
  jwt                  Generate a JSON Web Token
  pubkey               Manage your public keys
  repo                 Manage repositories
  set-username         Set your username
  settings             Manage server settings
  token                Manage access tokens
  user                 Manage users

Flags:
  -h, --help   help for this command

Use "ssh -p 23231 localhost [command] --help" for more information about a command.

2. copy id_ed25519 from server A and call info, see error

❯ ssh <server-A-ip> -p 2222 -i id_ed25519 info
Error: user not found

Expected behavior
should get same behavior

Screenshots
If applicable, add screenshots to help explain your problem.

Environment (please complete the following information):

• OS: [e.g. Linux]
• Terminal [e.g. kitty, iterm2, gnome-terminal]
• Version [e.g. v0.4.0]

Additional context
I have tried solution from similar issue #497 (comment)

❯ ssh <ip> -p 2222 -i id_ed25519 -o IdentitiesOnly=yes info
Error: user not found