You can simple use the type UUIDV4 that comes with Sequelize.
Here is more details :
UUIDV4
For example making this definition:
id: {
type: Sequelize.UUID,
defaultValue: Sequelize.UUIDV4,
allowNull: false,
primaryKey: true
}
This is not using the Sequelize CLI but you can use that native UUIDV4 by manually changing that.