fix: await error response, and as text

Signed-off-by: AJ ONeal <[email protected]>

dashsight.js

@@ -301,7 +301,7 @@
       `http request was ${resp.status}, not ok. See err.response for details.`,
     );
     // @ts-ignore
-    err.response = resp.json();
+    err.response = await resp.text();
     throw err;
   };