Test accounts

Assets/Accounts/Scripts/Progress.cs

@@ -101,4 +101,14 @@ public class Progress
         // Raise an exception when key is not found
         throw new KeyNotFoundException();
     }
+
+    /// <summary>
+    /// Check whether a key is present
+    /// </summary>
+    /// <param name="key">The key to check</param>
+    /// <returns>true if a item can be found with the specified key</returns>
+    public bool Has(string key)
+    {
+        return entries.Find(x => x.key == key) != null;
+    }
 }