Kong.cache:get(cache_key, opts, callback, state, parm1,parm2….)

Is the cache secure ? Can I put in there my password ?

If my unique key consists of several parts key = (key1, key2, key3…)
How can i access the kong.cache ? Do you supply mechanism (hashing etc) to associate
cache_key with key1,key2…

Is following part of documentation related to above question ? Can you please explain, example ?

https://docs.konghq.com/1.3.x/plugin-development/entities-cache/

Adding this value allows you to use the following function on the DAO of that entity:

cache_key = kong.db.<dao>:cache_key(arg1, arg2, arg3, ...)