How to use the graphql-migrations.DropCreateDatabaseAlways function in graphql-migrations

export async function initInMemoryDatabase(
  schema: string
): Promise {
  // initialize the knex db
  const knex = Knex({
    client: "sqlite3",
    connection: { filename: ":memory:" }
  });

  // migrate the schema
  const strategy = new DropCreateDatabaseAlways("sqlite3", knex);
  await migrate(schema, strategy);

  return new InMemoryDatabase(knex);
}

export async function createDatabaseMigration(schema: string, config: GenerateConfig) {
  const db = knex({
    client: config.db.database,
    connection: config.db.dbConfig,
  });
  // FIXME move to UpdateDatabaseIfChanges after adding relationships support
  const dbInitialization = new DropCreateDatabaseAlways(config.db.database, db);

  await migrate(schema, dbInitialization);
  return new Promise(resolve => db.destroy(resolve));
}

export async function handler() {
  const configInstance = new ConfigBuilder();
  const config = configInstance.config;

  const db = await connect(config.db.database, config.db.dbConfig);

  const initializationStrategy = new DropCreateDatabaseAlways(config.db.database, db);

  await createDB(initializationStrategy)

  postCommandMessage(`
Database resources created.

Run ${chalk.cyan(`npm run develop`)} to start the server.
  `)

  process.exit(0);
}