UserProject = sequelize.define('user_project', { role: Sequelize.STRING});
User.belongsToMany(Project, { through: UserProject });
User.findAll({
    include: {
      required: true,
      through: {
        attributes: [],
        model: UserProject
      },
      model:Project,
      order: [[{ model: UserProject}, "role", "ASC"]]
});