firebase cloud function post request body

I am making an http request from an angular form like that:

this.http.post(this.endPoint, formData, { responseType: 'text' }).subscribe(
res => {
console.log(res);
}
)


And I have a simple cloud function:

const functions = require('firebase-functions');
const cors = require('cors')({ origin: true });

exports.test = functions.https.onRequest((req, res) => {

cors(req, res, () => {
const data = req.body;
res.send(`Hello from Firebase! ${data}`);
});

})


However the req.body does not work and i get this response :

Hello from Firebase! [object Object]
​

Is there any idea why this happens?

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