How to use the @tanker/identity.createUserSecretBinary function in @tanker/identity

beforeEach(() => {
    secret = createUserSecretBinary('trustchainid', 'user-id');
    safe = generateKeySafe();
  });

beforeEach(async () => {
    dbName = `groupStore-test-${makePrefix()}`;
    userSecret = createUserSecretBinary('trustchainid', 'Merkle–Damgård');
    groupStoreConfig = { dbName, ...dataStoreConfig, schemas: GroupStore.schemas };
    datastore = await openDataStore(groupStoreConfig);
    groupStore = await GroupStore.open(datastore, userSecret);
  });

static async open() {
    const { generator } = await makeGenerator();
    const dataStore = await makeMemoryDataStore();
    const userSecret = createUserSecretBinary('trustchainid', 'userId');
    const groupStore = await GroupStore.open(dataStore, userSecret);

    return new GroupStoreBuilder(groupStore, generator);
  }

beforeEach(async () => {
    dbName = `keystore-test-${makePrefix()}`;
    keystoreConfig = { ...dataStoreConfig, dbName, schemas };
    datastore = await openDataStore(keystoreConfig);
    secret = createUserSecretBinary('trustchainid', 'bob');
  });

beforeEach(async () => {
    dbName = `sharedKeystore-test-${makePrefix()}`;
    userSecret = createUserSecretBinary('trustchainid', 'Merkle–Damgård');
    sharedKeystoreConfig = { dbName, ...dataStoreConfig, schemas: SharedKeystore.schemas };
    datastore = await openDataStore(sharedKeystoreConfig);
    sharedKeystore = await SharedKeystore.open(datastore, userSecret);
  });