Modelos

const User = sequelize.define('users', {
  name: {
    type:      Sequelize.STRING,
    allowNull: false,
    unique:    true,
    validate: {
      len: [2, 40]
    },
  },
  email: {
      type:      Sequelize.STRING,
      allowNull: false,
      validate: {
        isEmail: true
      },
  },
  password: {
    type:      Sequelize.STRING,
    allowNull: false,
    validate: {
      is: /^[a-zA-Z0-9_.-]*$/i,
      len: [2, 20]
    },
  }
}, {
  freezeTableName: true // Model tableName will be the same as the model name
});