installer la séquelle CLI
npm install --save-dev sequelize-cli
greenHermes
npm install --save-dev sequelize-cli$ npm i sequelize # This will install v6
# And one of the following:
$ npm i pg pg-hstore # Postgres
$ npm i mysql2
$ npm i mariadb
$ npm i sqlite3
$ npm i tedious # Microsoft SQL Server
$ npm i ibm_db #DB2$ npm install --save sequelize