How to handle an extractor error and give a custom reponse

[edg-l]

For example, when using a Json extractor to deserialize a body, if the body is incorrect, it responds with a 422 and a string body like: Failed to deserialize the JSON body into the target type: missing field password at line 4 column 1

What I want to know is how to handle this and give for example a JSON response.

[jplatte]

See the customize-extractor-error example.