{
                    //includes the cross-reference table to join the schools with parents
                    include: [
                        { model: db.parentSchools },
                        {
                            model: db.schools, as: "schools",
                            where: {
                                [Op.eq]: [{ name: req.params.school }]
                            }
                        }
                    ]
                }
            ).then(function (results) {
                res.json(results);
                console.log("parents for a school ", results);
            })

Parent.belongsToMany(models.schools, {
      as: "schools",
      through: "parentSchools",
      foreignKey: "parentId"
    });
  };

// a school belongs to many parents
        School.belongsToMany(models.parents, {
            as: "parents",
            // cross-reference table because a parent can have many schools as well
            through: "parentSchools",
            foreignKey: "schoolId"
        });