clojure.lang.ExceptionInfo: Request: [{:body {:foo "bar"}, :query-string nil, :uri "/users"}]<BR>==> Error: [{:foo disallowed-key, :username missing-required-key}]<BR>==> Context: [:body]
data: {:type :coercion-error,
:schema {:username java.lang.String},
:data {:foo "bar"},
:context :body}
Try destructuring it with slingshot: