I am trying to use basic Hello World project, provided by NHS Digital on github (see link below), but getting 401 (Unauthorised) response.
I have created a sandbox application using my developer account, and have enabled Hello World APIs, see screenshot below.
I have tried the code provided in git hub, and used the postman but receving same 401 error, please see both screenshots below. I have checked multiple times and API Key is correct for the sandbox environment. Can someone please provide any insight why I am getting this error and how to fix it?