config.cfg should have your bot's lichess personal access token on l1 and your bot's lichess username on l2
config.cfg should have LF line endings, not CRLF
lib/lichess_bot.dart is a standalone library for the lichess bot API
bin/lichess_bot.dart is a program that accepts all casual challenges and has a very primitive chess engine. If your bot is not yet an actual bot account, uncomment line 23.