I don’t know if there is a way to do import/export for the database now.
What I was able to do was to use a cloud function that would return all users info from the database:
Moralis.Cloud.define("getUsers", async function (request) {
const query = new Parse.Query("User");
query.limit(1000);
const result = await query.find({ useMasterKey: true });
return result;
});