E.g. rylev was duplicated in https://github.com/rust-lang/team/blob/0d40a7bf7d80a95a682a6e2365b740ba030fa571/teams/mods-venue.toml#L9 The validation should be added somewhere around here: https://github.com/rust-lang/team/blob/0cedf1794d3a40f7782c04eddace0f45aff9ee94/src/validate.rs#L224
