data provider: update internal caches if the data provider is shared

dataprovider/bolt.go

@@ -670,6 +670,11 @@ func (p *BoltProvider) dumpUsers() ([]User, error) {
 	return users, err
 }
 
+// bolt provider cannot be shared, so we always return no recently updated users
+func (p *BoltProvider) getRecentlyUpdatedUsers(after int64) ([]User, error) {
+	return nil, nil
+}
+
 func (p *BoltProvider) getUsers(limit int, offset int, order string) ([]User, error) {
 	users := make([]User, 0, limit)
 	var err error