Do not expose saving tasks to the api and change the way saving data is handled.

plugin/src/main/java/com/alttd/essentia/user/EssentiaUserManager.java

@@ -1,5 +1,6 @@
 package com.alttd.essentia.user;
 
+import com.alttd.essentia.EssentiaPlugin;
 import org.bukkit.entity.Player;
 
 import java.util.Map;
@@ -8,8 +9,14 @@ import java.util.concurrent.ConcurrentHashMap;
 
 public class EssentiaUserManager implements UserManager {
 
+    protected final EssentiaPlugin plugin;
+
     private final Map<UUID, User> essentiaPlayers = new ConcurrentHashMap<>();
 
+    public EssentiaUserManager(EssentiaPlugin plugin) {
+        this.plugin = plugin;
+    }
+
     @Override
     public User getUser(Player player) {
         return getUser(player.getUniqueId());
@@ -50,4 +57,21 @@ public class EssentiaUserManager implements UserManager {
         return new EssentiaUser.Builder().uuid(uuid).build();
     }
 
+    @Override
+    public void saveAllUsers() {
+        for (User user : getUsers().values()) {
+            if (user instanceof EssentiaUser essentiaUser) {
+                try {
+                    if (essentiaUser.saving() || !essentiaUser.needsSaving()) {
+                        continue;
+                    }
+                    plugin.storageProvider().startSaving(essentiaUser);
+                } catch(Exception e){
+                    essentiaUser.saving(false);
+                    e.printStackTrace();
+                }
+            }
+        }
+    }
+
 }