Function serenity::http::raw::get_reaction_users

pub fn get_reaction_users(
    channel_id: u64, 
    message_id: u64, 
    reaction_type: &ReactionType, 
    limit: u8, 
    after: Option<u64>
) -> Result<Vec<User>>

Gets user Ids based on their reaction to a message. This endpoint is dumb.