User.belongsToMany(House, { through: UserHouse });
House.belongsToMany(User, { through: UserHouse });
user.addHouse(house);
house.setUsers([user1, user2])
http://docs.sequelizejs.com/ fr/dernières/docs/associations/#appartient-à-plusieurs-associations http://docs.sequelizejs.com/en/ dernier/api/associations/appartient-à-plusieurs/
