Update demo.yml

    # Name of the database management system. For example, postgresql or sqlite

    type: 'postgresql'

    # Username used to log in to the database

    username: 'jay'

    username: 'username'

    # Password used to log in to the database

    password: 'abcde'

    password: 'password'

    # Host machine name (or localhost) where the database is running

    host: '127.0.0.1'

    # Port that the database is exposed on