Decrypt from other languages

[ngw]

It would be very useful to have a section on how to decrypt the encrypted vars from other languages/technologies, even without code but with a description of what to do, because right now for some reasons I'm having a lot of problems accessing the secrets from Ruby.
Apparently the plugin encodes using base64?
https://github.com/nordcloud/serverless-kms-secrets/blob/master/index.js#L81-L94

In ruby I do:

token = "blablabla" #what serverless-kms-secrets put in ENV
client = Aws::KMS::Client.new(region: 'us-east-1')
blob = Base64.encode64(token)
client.decrypt({ciphertext_blob: blob})
....
Aws::KMS::Errors::InvalidCiphertextException ()

I'm clearly decrypting it wrong, but I don't know how to move from here.