Congratulations on your Module Magic presentation at GopherCon 2022 - Nice job!

Your presentation had a FraudDetection service. Would you mind adding that to this repo?

Also, I found very minor errors in the curl commands. These work for me:

`curl --location --request POST 'http://localhost:8080/pay'
--header 'Authorization: BASIC Sm9obklzVmFsaWRVc2Vy'
--header 'Content-Type: application/json'
--data-raw '{
"credit_card_token":"xxxxx",
"amount": 1002
}'

curl --location --request POST 'http://localhost:8080/pay'
--header 'Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ.SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c'
--header 'Content-Type: application/json'
--data-raw '{
"credit_card_token":"xxxxx",
"amount": 1002
}'`

The first curl command returns payment success but the second one returns authentication failed

What changes are required to get the second curl command to return payment success ?

Thank you, so much, for your time and the wonderful presentation.