sync token lookup

app/models/lookup.rb

@@ -26,6 +26,11 @@ class Lookup < ApplicationRecord
     return lookup.value
   end
 
+  def self.get_sync_token
+    lookup = Lookup.find_by_lookup_type('sync_token')
+    return lookup.value
+  end
+
   def self.collection_of(type)
     Lookup.select("name, value").where("lookup_type" => type ).map { |l| [l.name, l.value] }