Fix/prevent returning error from external cache (#1576)

* Prevent returning error from external cache query

* link comment

* fix spell and remove unnecessary return

management/server/account.go

@@ -1223,6 +1223,8 @@ func (am *DefaultAccountManager) lookupUserInCache(userID string, account *Accou
 		}
 	}
 
+	// add extra check on external cache manager. We may get to this point when the user is not yet findable in IDP,
+	// or it didn't have its metadata updated with am.addAccountIDToIDPAppMeta
 	user, err := account.FindUser(userID)
 	if err != nil {
 		log.Errorf("failed finding user %s in account %s", userID, account.Id)
@@ -1232,8 +1234,7 @@ func (am *DefaultAccountManager) lookupUserInCache(userID string, account *Accou
 	key := user.IntegrationReference.CacheKey(account.Id, userID)
 	ud, err := am.externalCacheManager.Get(am.ctx, key)
 	if err != nil {
-		log.Errorf("failed to get externalCache for key: %s, error: %s", key, err)
-		return nil, status.Errorf(status.NotFound, "user %s not found in the IdP", userID)
+		log.Debugf("failed to get externalCache for key: %s, error: %s", key, err)
 	}
 
 	return ud, nil