In Deno MD5 unique ids can be created using the uuid library. This is a standard library which is reviewed by the Deno team.

In Deno MD5 hash of a given string can be created using the hash library. This is a standard library which is reviewed by the Deno team.

In Deno date and time can be handled through the built-in Javascript Date object. Deno also provides the standard datetime library which makes it very easy to get date & time in various formats.

A url can be encoded in Deno by either using the encodeURI() method or creating a URL object. No libraries are required to be imported.

This tutorial explains how to implement Login with Google in a Deno app using Google OAuth APIs.