Currently, implements all endpoints and caching using mongodb. Not tested for all endpoints but should be working. However, will only work properly when proper data is given and otherwise will fail.
MongoDB is required for usage, and mongo_db uri can be set using environmental variable WANIKANI_API_MONGODB_URI, defaults to mongodb://localhost:27017 if nothing is set.
- Directly accessing the cache instead of forcing to make a 304 request to access the cache