curl --request POST \
  --url https://www.postable.com/api/v1/auth/login \
  --header 'Content-Type: application/json' \
  --data '
{
  "app_id": "my-app",
  "email": "user@example.com",
  "password": "your-password"
}
'

{
  "data": {
    "token": "<string>"
  }
}