Module token 

Functions

cmd_join

One-shot join subcommand: register username, receive token, write token file.

read_cursor

Read the cursor position from disk, returning None if the file is absent or empty.

token_file_path

Returns the canonical token file path: /tmp/room-<room_id>-<username>.token.

username_from_token

Look up the username associated with token by scanning stored token files for room_id.

write_cursor

Persist the cursor position to disk.