--- a/net/minecraft/server/players/UserNameToIdResolver.java
+++ b/net/minecraft/server/players/UserNameToIdResolver.java
@@ -13,4 +_,8 @@
     void resolveOfflineUsers(boolean resolveOfflineUsers);
 
     void save();
+
+    void save(boolean async); // Paper
+
+    @javax.annotation.Nullable NameAndId getIfCached(String name); // Paper
 }
