What will be the best way to implement Many-to-many relationship between two tables?

[NamamiShanker]

Hello, devs!

Thanks for making this awesome tool. The blog post by @apryor6 on Flask APIs is excellent, and I have learned a lot from it.

I am making a library management application. A library_member can have many books and a copy of a book can be owned by many library_member at a time. This is a many-to-many relationship. What is the best way to implement it such that it follows flaskerize file structure?