Update Documentation to be compatible with Beta2

this one took a while

docs/guides/samples/require_owner.cs

@@ -1,16 +1,18 @@
 // Defining the Precondition
 
-// Specify that this precondition can target a Class (Module/Group) or Method (Command)
-[AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, AllowMultiple = false, Inherited = true)]
 // Inherit from PreconditionAttribute
 public class RequireOwnerAttribute : PreconditionAttribute
 {
-    public readonly ulong OwnerId = 66078337084162048;
-
     // Override the CheckPermissions method
-    public override Task<PreconditionResult> CheckPermissions(IUserMessage context, Command executingCommand, object moduleInstance)
+    public override Task<PreconditionResult> CheckPermissions(CommandContext context, CommandInfo command, IDependencyMap map)
     {
-        // If the author of the message is '66078337084162048', return success; otherwise fail. 
-        return Task.FromResult(context.Author.Id == OwnerId ? PreconditionResult.FromSuccess() : PreconditionResult.FromError("You must be the owner of the bot."));
+        // Get the ID of the bot's owner
+        var ownerId = (await map.Get<DiscordSocketClient>().GetApplicationInfoAsync()).Owner.Id;
+        // If this command was executed by that user, return a success
+        if (context.User.Id == ownerId)
+            return PreconditionResult.FromSuccess();
+        // Since it wasn't, fail
+        else
+            return PreconditionResult.FromError("You must be the owner of the bot to run this command.");
     }
 }