How to customize session data in NextAuth

Of late, I have been diving into Next.js and absolutely loving it. I wanted to put my learnings to practice, so I started building an app to solve a personal pain point. Along the way, I wanted to add authentication for my app and decided to use NextAuth, the go-to auth library for Next.js. Overall, it was a great experience, with a few humps along the way, but in the end, it all worked out well.