fix: better error reporting

Author: mickvandijke

package.json

@@ -1,6 +1,6 @@
 {
   "name": "torrust-index-api-lib",
-  "version": "0.1.14",
+  "version": "0.1.15",
   "description": "Contains API functions for the Torrust project.",
   "repository": "https://github.com/torrust/torrust-index-types-lib",
   "license": "MIT",

src/utils/fetch.ts

@@ -3,7 +3,9 @@ export async function request(path: string, config: RequestInit): Promise<Respon
     const response = await fetch(request);
 
     if(!response.ok) {
-        throw new Error(response.statusText);
+        const res = await response.json();
+
+        throw new Error(res?.error ?? response.statusText);
     }
 
     return response;