$ npm i egg-akiya-egg-mongoose --save
// {app_root}/config/plugin.js
exports.akiyaEggMongoose = {
enable: true,
package: 'egg-akiya-egg-mongoose',
};
// {app_root}/config/config.default.js
exports.akiyaEggMongoose = {
};
see config/config.default.js for more detail.
Please open an issue here.