Message is empty error on Outlook Node.js sendMail API request on pipedream

   async(event, steps, auths) => {
      return await require("@pipedreamhq/platform").axios(this, {
        "url": `https://graph.microsoft.com/v1.0/me/sendMail`,
        "headers": {
          "Authorization": `Bearer ${auths.microsoft_outlook.oauth_access_token}`,
          "Content-Type": 'application/json'
        },
        "method": 'POST',
        "message": {
          "subject": 'Hey there, your whatbuylists product details are attached',
          "body": `Thank you for your purchase of this whatbuylists product list. The details of the list are available here: ${steps.get_product.$return_value.metadata.successURL}`,
          "toRecipients": `${steps.trigger.event.data.object.customer_details.email}`
          }
        }

      )
      }

{
  "error": {
    "code": "ErrorInvalidParameter",
    "message": "The value of the parameter 'Message' is empty."
  }
}
at null.createError (/tmp/ee/node_modules/@pipedreamhq/platform/node_modules/axios/lib/core/createError.js:16:15)
at null.settle (/tmp/ee/node_modules/@pipedreamhq/platform/node_modules/axios/lib/core/settle.js:17:12)
at IncomingMessage.handleStreamEnd (/tmp/ee/node_modules/@pipedreamhq/platform/node_modules/axios/lib/adapters/http.js:236:11)
at IncomingMessage.emit (events.js:387:35)
at null.endReadableNT (internal/streams/readable.js:1317:12)
at process.processTicksAndRejections (internal/process/task_queues.js:82:21)