chore: log client creds errors

Author: matthew2564

package-lock.json

@@ -1,6 +1,6 @@
 {
 	"name": "@dvsa/appdev-api-common",
-	"version": "0.10.3",
+	"version": "0.10.4",
 	"keywords": ["dvsa", "nodejs", "typescript"],
 	"author": "DVSA",
 	"repository": {

packages/appdev-common/package.json

@@ -77,7 +77,12 @@ export class ClientCredentials {
 		});
 
 		if (!response.ok) {
-			console.error("Error fetching client credentials", response);
+			const errorBody = await response.text();
+			console.error(
+				"Error fetching client credentials",
+				response.status,
+				errorBody,
+			);
 			throw new Error("Failed to fetch client credentials");
 		}