Add Header Comments, Add 'null'-Checks on Commands

Server/Extensions/ClientExtension.cs

@@ -3,17 +3,24 @@ using reallife_gamemode.Model;
 using reallife_gamemode.Server.Entities;
 using System;
 using System.Collections.Generic;
+using System.Linq;
 using System.Text;
 
 namespace reallife_gamemode.Server.Extensions
 {
     public static class ClientExtension
     {
+        /**
+         * @overview Life of German Reallife - Client Extension (ClientExtension.cs)
+         * @author VegaZ, hydrant
+         * @copyright (c) 2008 - 2018 Life of German
+         */
+
         public static User GetUser(this Client client)
         {
             using(DatabaseContext dbContext = new DatabaseContext())
             {
-                return dbContext.Users.Find(client.Name);
+                return dbContext.Users.FirstOrDefault(u => u.Name == client.Name);
             }
         }
     }