How to correctly set Http Request Header in Angular 2

Question

I have an Ionic 2 application using Angular 2, which is sending an Http PUT to a ASP.NET Core API server. Here\'s the method I\'m using to send the request:

Answer 1

You have a typo.

Change: headers.append('authentication', ${student.token});

To: headers.append('Authentication', student.token);

NOTE the Authentication is capitalized