------------------------------------------------------------------
== POST /oauth2/token   grant_type=client_credentials
------------------------------------------------------------------
$ curl -su demo-service:service-secret -d grant_type=client_credentials \
       -d scope=orders.read http://localhost:9000/oauth2/token
{
    "access_token": "eyJraWQiOiIyNDgwNWM5Ni02MGY1LTQ5MDItYTczYi03ODgxYmFkNWY5ZGMiLCJhbGciOiJSUzI1NiJ9.eyJzdWIiOiJkZW1vLXNlcnZpY2UiLCJhdWQiOiJkZW1vLXNlcnZpY2UiLCJuYmYiOjE3ODc1Mzg3MzksInNjb3BlIjpbIm9yZGVycy5yZWFkIl0sImlzcyI6Imh0dHA6Ly9sb2NhbGhvc3Q6OTAwMCIsImV4cCI6MTc4NzUzOTMzOSwiaWF0IjoxNzg3NTM4NzM5LCJqdGkiOiIzN2E0NTlmMS0xZjdlLTQ5ZTktOWQyNi01YmY0MjM5YmM1ZTkifQ.UxWq_Cs1bBhqQicgcLU7Z-vYW-jWxuVbrmco1gmXM8cxRvRjXoNpaDkYCiTI51gu21K9mXsOxf45l5dg7Rh9Gku7fNWJeKcWll5Ekcjpgq9msCwjLNPVxbuDVV8K-2f8OcPJ1Y6ojDtqxQq9RCBKEMxuBhl1Plz8nMjUYUm1A-njz43wL9SDJslz2xiIgoEkLkiRyVdk4ArzWGOQ4WLKR_y-bIn0dIhyTh4bVDy4rf2LTFqyPl_ZTCAH_ZUqXZuJhFn73MpxEaavwIHl-b8EDCpyk2vCUQnSykIMEaAbEPs0JBNaBpah-lPR0FFZIr2vZQxI4xpxButI98W2d9CtBQ",
    "scope": "orders.read",
    "token_type": "Bearer",
    "expires_in": 599
}

------------------------------------------------------------------
== JOSE header
------------------------------------------------------------------
{
  "alg": "RS256",
  "kid": "24805c96-60f5-4902-a73b-7881bad5f9dc"
}

------------------------------------------------------------------
== Claims
------------------------------------------------------------------
{
  "aud": "demo-service",
  "exp": 1787539339,
  "iat": 1787538739,
  "iss": "http://localhost:9000",
  "jti": "37a459f1-1f7e-49e9-9d26-5bf4239bc5e9",
  "nbf": 1787538739,
  "scope": [
    "orders.read"
  ],
  "sub": "demo-service"
}

------------------------------------------------------------------
== Wrong secret
------------------------------------------------------------------
$ curl -si -u demo-service:WRONG -d grant_type=client_credentials http://localhost:9000/oauth2/token
HTTP/1.1 401
{"error":"invalid_client"}
------------------------------------------------------------------
== A grant the client is not registered for
------------------------------------------------------------------
$ curl -si -u demo-service:service-secret -d grant_type=authorization_code -d code=x http://localhost:9000/oauth2/token
HTTP/1.1 400
{"error":"invalid_grant"}
------------------------------------------------------------------
== A scope the client is not registered for
------------------------------------------------------------------
$ curl -s -u demo-service:service-secret -d grant_type=client_credentials -d scope=orders.write http://localhost:9000/oauth2/token
{"error":"invalid_scope"}

------------------------------------------------------------------
== Calling the resource server with the token
------------------------------------------------------------------
GET /public -> 401
  WWW-Authenticate: Bearer error="invalid_token", error_description="An error occurred while attempting to decode the Jwt: the required audience orders-api is missing", error_uri="https://tools.ietf.org/html/rfc6750#section-3.1", resource_metadata="http://localhost:8090/.well-known/oauth-protected-resource"

GET /api/orders -> 401
  WWW-Authenticate: Bearer error="invalid_token", error_description="An error occurred while attempting to decode the Jwt: the required audience orders-api is missing", error_uri="https://tools.ietf.org/html/rfc6750#section-3.1", resource_metadata="http://localhost:8090/.well-known/oauth-protected-resource"

GET /api/admin -> 401
  WWW-Authenticate: Bearer error="invalid_token", error_description="An error occurred while attempting to decode the Jwt: the required audience orders-api is missing", error_uri="https://tools.ietf.org/html/rfc6750#section-3.1", resource_metadata="http://localhost:8090/.well-known/oauth-protected-resource"