// THIS DOES NOT WORK
MongooseModule.forRootAsync({
  imports: [MongoConfigModule],
  useFactory: async (mongoConfigService: MongoConfigService) => {
    return {
      ...mongoConfigService.mongoConfig,
      connectionFactory: (connection: Connection) => {
        connection.on('connected', () => console.log('connected'));
        connection.on('open', () => console.log('open'));
        connection.on('disconnected', () => console.log('disconnected'));
        connection.on('reconnected', () => console.log('reconnected'));
        connection.on('disconnecting', () => console.log('disconnecting'));

        return connection;
      },
    };
  },
  inject: [MongoConfigService],
}),

MongooseModule.forRootAsync({
  imports: [MongoConfigModule],
  useFactory: async (mongoConfigService: MongoConfigService) => {
    return {
      ...mongoConfigService.mongoConfig,
      // Once connection is established
      connectionFactory: (connection: Connection) => {
        connection.plugin(require('mongoose-autopopulate'));

        return connection;
      },
      // Before connection is established and returned as Promise.
      onConnectionCreate: (connection: Connection) => {
        connection.on('connected', () => console.log('connected'));
        connection.on('open', () => console.log('open'));
        connection.on('disconnected', () => console.log('disconnected'));
        connection.on('reconnected', () => console.log('reconnected'));
        connection.on('disconnecting', () => console.log('disconnecting'));

        return connection;
      },
    };
  },
  inject: [MongoConfigService],
}),