Please tell me how to add and query data in sequelize many-to-many relationship.

code tables and tag tables are many-to-many relationships

code Table model

"use strict";
module.exports = function(sequelize, DataTypes) {
  var code = sequelize.define("code", {
    markdown: DataTypes.TEXT,
    title:DataTypes.STRING
  }, {
    timestamps: true,
    paranoid: true,
    classMethods: {
      associate: function(models) {
        code.belongsToMany(models["tag"], { through: "tagcode" })
      }
    }
  });
  return code;
};

tag Table model

"use strict";
module.exports = function(sequelize, DataTypes) {
  var tag = sequelize.define("tag", {
    name: DataTypes.STRING,
  }, {
    timestamps: true,
    paranoid: true,
    classMethods: {
      associate: function(models) {
        tag.belongsToMany(models["code"], { through: "tagcode" })
      }
    }
  });
  return tag;
};

the above two model generate the tagcode table.

tag the table already has data.

  dbModels.code.create({
        title: req.body.title,
        markdown: req.body.markdown,
        tags: [
            { name: "Alpha"},
            { name: "Beta"}
        ]

    },
        {
        include: {model:dbModels.tag }
        }
    ).then(function (code) {
        res.status(200).json(code)
    })

the code above adds" Alpha""Beta" tag "every time you add code.
now wants to pass tagId (multiple) when adding code records, and then add the corresponding association in the relational table tagcode, instead of adding data in the tag table.
could you tell me how to implement it?

dbModels.code.create({ title: req.body.title, codeCategoryId: req.body.type, limit: 1, markdown: req.body.markdown, }).then(function (code) { dbModels.tag.findAll({where: {id: req.body.tags}}).then(function (tags) { code.setTags(tags) return res.status(200).json({ message:'' }) }) })