Come inserire una chiave esterna nel modello di sequelize

User.belongsToMany(House, { through: UserHouse });
House.belongsToMany(User, { through: UserHouse });

user.addHouse(house);
house.setUsers([user1, user2])

http://docs.sequelizejs.com/ it/latest/docs/associations/#belongs-to-many-associations http://docs.sequelizejs.com/en/ latest/api/associations/belongs-to-many/