fix: treat Hydra 401 response like a 404 (#50)

Fixes #49

hydra/client.go

@@ -33,7 +33,7 @@ func (c *Client) GetOAuth2Client(id string) (*OAuth2ClientJSON, bool, error) {
 	switch resp.StatusCode {
 	case http.StatusOK:
 		return jsonClient, true, nil
-	case http.StatusNotFound:
+	case http.StatusNotFound, http.StatusUnauthorized:
 		return nil, false, nil
 	default:
 		return nil, false, fmt.Errorf("%s %s http request returned unexpected status code %s", req.Method, req.URL.String(), resp.Status)

hydra/client_test.go

@@ -30,6 +30,7 @@ const (
 	testClientWithMetadataCreated = `{"client_id":"test-id-21","client_secret":"TmGkvcY7k526","owner":"test-name-21","scope":"some,other,scopes","grant_types":["type2"],"token_endpoint_auth_method":"client_secret_basic","metadata":{"property1":1,"property2":"2"}}`
 
 	statusNotFoundBody            = `{"error":"Not Found","error_description":"Unable to locate the requested resource","status_code":404,"request_id":"id"}`
+	statusUnauthorizedBody        = `{"error":"The request could not be authorized","error_description":"The requested OAuth 2.0 client does not exist or you did not provide the necessary credentials","status_code":401,"request_id":"id"}`
 	statusConflictBody            = `{"error":"Unable to insert or update resource because a resource with that value exists already","error_description":"","status_code":409,"request_id":"id"`
 	statusInternalServerErrorBody = "the server encountered an internal error or misconfiguration and was unable to complete your request"
 )
@@ -77,6 +78,11 @@ func TestCRUD(t *testing.T) {
 				statusNotFoundBody,
 				nil,
 			},
+			"getting unauthorized request": {
+				http.StatusUnauthorized,
+				statusUnauthorizedBody,
+				nil,
+			},
 			"internal server error when requesting": {
 				http.StatusInternalServerError,
 				statusInternalServerErrorBody,