I want to create a header for a http get request which should have following key and value

[![enter image description here](https://i.stack.imgur.com/GcZBP.png)](https://i.stack.imgur.com/GcZBP.png)

Currently I am doing this to achieve it:

```
let header= new Headers();
header.append('Authorization','Token '+this.auth.data.authtoken);

```

But it is 401 unauthorized response. But in postman it is working.