consider not using keys: :atoms

[norpan]

JSON decoding is currently done using keys: :atoms which is a bit problematic, since we have dynamic keys in some instances so the number of atoms is not bounded.

From https://github.com/devinus/poison:

You can use the keys: :atoms variant to make sure all atoms are created as needed. However, unless you absolutely know what you're doing, do not do it. Atoms are not garbage-collected, see Erlang Efficiency Guide for more info:

Atoms are not garbage-collected. Once an atom is created, it will never be removed. The emulator will terminate if the limit for the number of atoms (1048576 by default) is reached.

[norpan]

One alternative would be to use decode(body, as: struct) and pass struct down from all the callers.