Capture json.loads exceptions

package_alerts/package_alerts

@@ -115,7 +115,11 @@ def get_token(ot):
     if result.status_code != 200:
         print("unable to auth, exiting")
         sys.exit(1)
-    token = json.loads(result.content)["access_token"]
+    try:
+        token = json.loads(result.content)["access_token"]
+    except json.decoder.JSONDecodeError:
+        print("unable to auth, exiting")
+        sys.exit(1)
     return token
 
 
@@ -136,7 +140,12 @@ def get_upstream(token, feed):
     packages = []
     while True:
         result = call_api(token, url, params={"limit": 100, "offset": offset})
-        j = json.loads(result.content)
+        try:
+            j = json.loads(result.content)
+        except json.decoder.JSONDecodeError:
+            # TODO: fix this?
+            print("Encountered an error retrieving upstream packages, exiting loop", flush=True)
+            return []
         offset = j["pagination"]["offset"]
         count = j["pagination"]["count"]
         for p in j["body"]: