[Discussion] Add the error code & type to the API response

[hideokamoto-stripe]

Summary

Add the error code and error type from the Stripe API to the API response.

example:

    return res.status(400).send({
      error: {
        message: e.message,
+       code: e.code,
+       type: e.type,  
      },
    });

Background

Some testing codes are using an error message from the Stripe API.
But when the error message is changed, it will be failed. And we need to update the test code to follow its updates.
example: https://github.com/stripe-samples/accept-a-payment/pull/1382/files

We can reduce these tasks when we use the error code and type instead of the error message.