Implement simple user creation system

Assets/Common/Scripts/UserList.cs

@@ -0,0 +1,45 @@
+using System.Collections.Generic;
+using UnityEditor;
+using UnityEngine;
+using UnityEngine.UI;
+
+[CreateAssetMenu(menuName = "Create new Scriptable/User/List")]
+public class UserList : ScriptableObject
+{
+    [Header("Template")]
+    // Reference to User template
+    public ScriptableObject userTemplate;
+
+    [Header("Users")]
+    // List of users
+    public List<User> users = new List<User>();
+
+    // Create a new User
+    public User CreateNewUser(string name, Sprite avatar)
+    {
+        User user = ScriptableObject.CreateInstance<User>();
+        user.username = name;
+        user.avatar = avatar;
+        return user;
+    }
+
+    // Create a new User and add to list
+    public User CreateAndAddNewUser(string name, Sprite avatar)
+    {
+        User user = CreateNewUser(name, avatar);
+        users.Add(user);
+        EditorUtility.SetDirty(this);
+        AssetDatabase.CreateAsset(user, $"Assets/Common/ScriptableObjects/Users/{name}.asset");
+        AssetDatabase.SaveAssets();
+        return user;
+    }
+
+    // Get user by username, returns `null` if no user can be found with such name
+    public User GetUserByUsername(string username)
+    {
+        foreach (User user in users)
+            if (user.username == username) return user;
+
+        return null;
+    }
+}