code: function knexMysqlExpress(options) {
    return function knexMysqlExpress(req, res, next) {
      req.knex = knex(options);
      res.once("finish", done.bind(this, req.knex));
      next();
    };
  }
docs: Set a MySQL flavored Knex connection that can be accessed via Koa or Express middleware.
  
  @return {Function}
  Koa middleware.