How to create a DID not tied to a browser session

createDID.js

import { DidIonMethod, DidKeyMethod, DidDhtMethod } from '@web5/dids';

async function main() {
    // const myDid = await DidIonMethod.create('ion');
    const myDidKey = await DidKeyMethod.create('key');
    const myDidDht = await DidDhtMethod.create('dht');
    console.log(myDidKey);
    console.log(myDidDht);

}

main();