relationshipTester.js

const models = require('./models');
const User = models.User;
const Company = models.Company;
const WorkingDay = models.WorkingDay;

User.bulkCreate([
  {email: 'john-doe@domain.com', firstName: 'John',  lastName: 'DOE', companyId: 1},
  {email: 'log_w@domain.com', firstName: 'Logan',  lastName: 'WOLVERINE', companyId: 1},
  {email: 'john-connor@domain.com', firstName: 'John',  lastName: 'CONNOR', companyId: 1}
])
.then((newUsers) => {
  console.log(newUsers)
})
.catch((err) => {
  console.log("Error while users creation : ", err)
})