if .iam is successfull it will delete command and confirmation after 3 seconds

NadekoBot/Modules/Administration/AdministrationModule.cs

@@ -995,7 +995,6 @@ namespace NadekoBot.Modules.Administration
                             await e.Channel.SendMessage("Nobody. (not 100% sure)");
                         else
                             await e.Channel.SendMessage("• " + string.Join("\n• ", arr));
-
                     });
 
             });

NadekoBot/Modules/Administration/Commands/SelfAssignedRolesCommand.cs

@@ -4,6 +4,7 @@ using NadekoBot.Modules.Permissions.Classes;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
+using System.Threading.Tasks;
 
 namespace NadekoBot.Modules.Administration.Commands
 {
@@ -121,7 +122,14 @@ namespace NadekoBot.Modules.Administration.Commands
                         return;
                     }
                     await e.User.AddRoles(role).ConfigureAwait(false);
-                    await e.Channel.SendMessage($":ok:You now have {role.Name} role.").ConfigureAwait(false);
+                    var msg = await e.Channel.SendMessage($":ok:You now have {role.Name} role.").ConfigureAwait(false);
+                    await Task.Delay(3000);
+                    await msg.Delete();
+                    try
+                    {
+                        await e.Message.Delete();
+                    }
+                    catch { }
                 });
 
             cgb.CreateCommand(".iamn")