message: fix rest runMethod body logic
diff: @@ -23,7 +23,7 @@ export async function runMethod<T = any>(
  // For proxies we don't need to do any of the legwork so we just forward the request
  if (!url.startsWith(`${BASE_URL}/v${API_VERSION}`) && !url.startsWith(IMAGE_BASE_URL)) {
  const result = await fetch(url, {
  - body: JSON.stringify(body),
  + body: body ? JSON.stringify(body) : undefined,
  headers: {
  Authorization: rest.secretKey,
  "Content-Type": "application/json",
  