# IRC Server Password Support

## Task
Add support for connecting to password-protected IRC servers by sending the PASS command during connection, and allow setting a custom IRC username.

## Changes

- **src/config.rs**: Added `username: Option<String>` field to `IrcConfig`. Added `BridgeConfig::irc_server_password()` method that reads `IRC_PASSWORD` from the environment (returns `Option<String>`). Updated `default_for_test()` and tests for the new field and method.
- **src/irc_task.rs**: Set `password` and `username` on the `irc` crate's `Config` when building the IRC connection, sourcing the password from `BridgeConfig::irc_server_password()` and username from `IrcConfig.username`.
- **config.toml**: Removed stale `server_password` field, added comment about `IRC_PASSWORD` env var.
- **config.example.toml**: Added commented-out `username` field and `IRC_PASSWORD` env var documentation.

## Usage
Set the `IRC_PASSWORD` environment variable before running the bridge to authenticate with the IRC server. Optionally set `username` in `[irc]` config for a custom ident.

## Follow-up
- None identified.