replace early returns with NotFoundError

test /api/webhook/incoming-message

package.json

@@ -80,6 +80,7 @@
 		"eslint": "7.32.0",
 		"husky": "6.0.0",
 		"lint-staged": "10.5.4",
+		"next-test-api-route-handler": "2.0.2",
 		"prettier": "2.3.2",
 		"prettier-plugin-prisma": "0.14.0",
 		"pretty-quick": "3.1.1",