Added RequireOwner support for User tokens

src/Discord.Net.Commands/Attributes/Preconditions/RequireOwnerAttribute.cs

@@ -12,9 +12,20 @@ namespace Discord.Commands
     {
         public override async Task<PreconditionResult> CheckPermissions(ICommandContext context, CommandInfo command, IDependencyMap map)
         {
-            var application = await context.Client.GetApplicationInfoAsync();
-            if (context.User.Id == application.Owner.Id) return PreconditionResult.FromSuccess();
-            return PreconditionResult.FromError("Command can only be run by the owner of the bot");
+            switch (context.Client.TokenType)
+            {
+                case TokenType.Bot:
+                    var application = await context.Client.GetApplicationInfoAsync();
+                    if (context.User.Id != application.Owner.Id)
+                        return PreconditionResult.FromError("Command can only be run by the owner of the bot");
+                    return PreconditionResult.FromSuccess();
+                case TokenType.User:
+                    if (context.User.Id != context.Client.CurrentUser.Id)
+                        return PreconditionResult.FromError("Command can only be run by the owner of the bot");
+                    return PreconditionResult.FromSuccess();
+                default:
+                    return PreconditionResult.FromError($"{nameof(RequireOwnerAttribute)} is not supported by this {nameof(TokenType)}.");                    
+            }
         }
     }
 }

src/Discord.Net.Core/IDiscordClient.cs

@@ -9,6 +9,7 @@ namespace Discord
     {
         ConnectionState ConnectionState { get; }
         ISelfUser CurrentUser { get; }
+        TokenType TokenType { get; }
 
         Task StartAsync();
         Task StopAsync();

src/Discord.Net.Rest/BaseDiscordClient.cs

@@ -26,6 +26,7 @@ namespace Discord.Rest
         internal LogManager LogManager { get; }
         public LoginState LoginState { get; private set; }
         public ISelfUser CurrentUser { get; protected set; }
+        public TokenType TokenType => ApiClient.AuthTokenType;
         
         /// <summary> Creates a new REST-only discord client. </summary>
         internal BaseDiscordClient(DiscordRestConfig config, API.DiscordRestApiClient client)