emqx4.3/apps/emqx_auth/data/user-credentials.json

[
    {
        "user_id":"myuser1",
        "password_hash":"c5e46903df45e5dc096dc74657610dbee8deaacae656df88a1788f1847390242",
        "salt": "e378187547bf2d6f0545a3f441aa4d8a",
        "is_superuser": true
    },
    {
        "user_id":"myuser2",
        "password_hash":"f4d17f300b11e522fd33f497c11b126ef1ea5149c74d2220f9a16dc876d4567b",
        "salt": "6d3f9bd5b54d94b98adbcfe10b6d181f",
        "is_superuser": false
    }
]