Sendgrid axios.post('/api/surveys', survey) not working even after changing updated Mailer.js from udemy Q&A

[proust01]

Hi, Stephen. thanks for all these support. I've been struggling test sending survey object with axios according to lecture 139 but even after updating new Mailer.js file, according to Martin from Q&A, it still doesn't work. This is error I got in my terminal.

and this is my github link :
https://github.com/proust01/emaily/blob/master/services/Mailer.js

[0] (node:14108) UnhandledPromiseRejectionWarning: Error: Expecting object for Mail data
[0] at Mail.fromData (C:\Users\David Cho\react-node\node_modules@sendgrid\helpers\classes\mail.js:55:13)
[0] at new Mail (C:\Users\David Cho\react-node\node_modules@sendgrid\helpers\classes\mail.js:44:12)
[0] at Function.create (C:\Users\David Cho\react-node\node_modules@sendgrid\helpers\classes\mail.js:627:12)
[0] at MailService.send (C:\Users\David Cho\react-node\node_modules@sendgrid\mail\src\classes\mail-service.js:174:25)
[0] at Mailer.send (C:\Users\David Cho\react-node\services\Mailer.js:28:29)
[0] at app.post (C:\Users\David Cho\react-node\routes\surveyRoutes.js:26:17)
[0] at Layer.handle [as handle_request] (C:\Users\David Cho\react-node\node_modules\express\lib\router\layer.js:95:5)
[0] at next (C:\Users\David Cho\react-node\node_modules\express\lib\router\route.js:137:13)
[0] at module.exports (C:\Users\David Cho\react-node\middlewares\requireCredits.js:5:5)
[0] at Layer.handle [as handle_request] (C:\Users\David Cho\react-node\node_modules\express\lib\router\layer.js:95:5)
[0] at next (C:\Users\David Cho\react-node\node_modules\express\lib\router\route.js:137:13)
[0] at module.exports (C:\Users\David Cho\react-node\middlewares\requireLogin.js:5:5)
[0] at Layer.handle [as handle_request] (C:\Users\David Cho\react-node\node_modules\express\lib\router\layer.js:95:5)
[0] at next (C:\Users\David Cho\react-node\node_modules\express\lib\router\route.js:137:13)
[0] at Route.dispatch (C:\Users\David Cho\react-node\node_modules\express\lib\router\route.js:112:3)
[0] at Layer.handle [as handle_request] (C:\Users\David Cho\react-node\node_modules\express\lib\router\layer.js:95:5)
[0] (node:14108) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 2)