JAVASCRIPT

connect existing database with sequelize

sequelize-auto -h <host> -d <database> -u <user> -x [password] -p [port]  --dialect [dialect] -c [/path/to/config] -o [/path/to/models] -t [tableName] -C

Connect Sequelize to Database

const db = new Sequelize('postgres://localhost:3000/yourDatabaseNameHere')
                          //^ Our protocol   ^Path to DB     ^Database name