untested WIP

src/Errors/MissingBodyValue.ts

@@ -0,0 +1,9 @@
+export default class MissingBodyValue extends Error {
+  constructor(valueName: string) {
+    super();
+    this.name = "MissingBodyValue";
+    this.message = `Value '${valueName}' is missing from the body.`;
+    this.cause =
+      "A value that was required by the body of this request is missing.";
+  }
+}