como agrergar datos a un correo de gmail de forma anonima

fetch('https://anonymous.4open.science/anon/user/login', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    "email": "johndoe@gmail.com",
    "password": "foo"
  })
})
.then(res => res.json())
.then(res => {
  console.log(res)
  fetch('https://anonymous.4open.science/anon/comments/5e7d7d0606b92e0014e9ce4e', {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
      'Authorization': `Bearer ${res.token}`
    },
    body: JSON.stringify({
      "desc": "Hi there, this is my first comment",
      "parent": "5d3e98bb3ab3f500142601b6"
    })
  })
  .then(res =>