Need help with basic crypto in Erlang/Elixir: Decryption Error: Failed to decrypt:

Thanks for this, ill review.

But it begs the question,
Take meta’s requiremets, for interfacing with WhatsApp flows, it’s well spelt out and we see how its done in 3 other mainstream languages.

Ive been at this for 2 days in elixir and erlang with no success.

Not good.