Converted the !login command into the /login slash command.

DiscordBot.App/Commands/AuthenticationCommands.cs

@@ -0,0 +1,43 @@
+using DiscordBot.Apis;
+using DiscordBot.Services;
+using DSharpPlus;
+using DSharpPlus.EventArgs;
+using DSharpPlus.SlashCommands;
+using System.Xml.Linq;
+
+namespace DiscordBot.Commands;
+
+public class AuthenticationCommands : ApplicationCommandModule
+{
+    private readonly DiscordService _discordService;
+    private readonly IServerDiscordApi _serverDiscordApi;
+
+    public AuthenticationCommands(DiscordService discordService, IServerDiscordApi serverDiscordApi)
+    {
+        _discordService = discordService;
+        _serverDiscordApi = serverDiscordApi;
+    }
+
+    [SlashCommand("login", "Use to link your Discord user to an in-game account. Use via direct message only!", defaultPermission: false)]
+    public async Task LoginCommand(InteractionContext ctx, [Option("account", "your in-game account name")] string username, [Option("password", "the password for your in-game account")] string password)
+    {
+        if (ctx.Channel.Type != ChannelType.Private)
+        {
+            // Do not provide an interaction context response so the command parameters remain hidden to others. Send a direct message instead.
+            await ctx.Member.SendMessageAsync("Please do not use the **/login** command in public channels as it could compromise your in-game account! It is also recommended to click **\"Dismiss message\"** on all of the notifications that contain the bot command to permanently hide your credentials.");
+            return;
+        }
+
+        var discordMember = await _discordService.Guild.GetMemberAsync(ctx.User.Id);
+
+        if (discordMember != null)
+        {
+            var response = await _serverDiscordApi.PostLogin(username, discordMember.Id, discordMember.Username, discordMember.Discriminator, discordMember.AvatarUrl, password);
+
+            if (response.Status)
+                await discordMember.GrantRoleAsync(_discordService.MemberRole);
+
+            await ctx.CreateResponseAsync(response.Message);
+        }
+    }
+}

DiscordBot.App/Program.cs

@@ -25,7 +25,6 @@
 builder.Services.AddControllers();
 builder.Services.AddEndpointsApiExplorer();
 builder.Services.AddSingleton<DiscordService>();
-builder.Services.AddSingleton<LoginService>();
 builder.Services.AddSingleton<RunnerService>();
 builder.Services.AddSingleton<GuildJoinService>();
 builder.Services.AddHostedService(provider => provider.GetService<RunnerService>());

DiscordBot.App/Services/DiscordService.cs

@@ -66,10 +66,10 @@ public async Task Start()
         };
 
         var slashCommands = Client.UseSlashCommands(slashConfig);
-
+        slashCommands.RegisterCommands<AuthenticationCommands>();
         slashCommands.RegisterCommands<GeneralCommands>();
         slashCommands.RegisterCommands<RestartCommands>();
-
+        
         await Client.InitializeAsync();
         await Client.ConnectAsync();
 

DiscordBot.App/Services/RunnerService.cs

@@ -7,15 +7,13 @@ namespace DiscordBot.Services;
 public class RunnerService : BackgroundService
 {
     private readonly DiscordService _discordService;
-    private readonly LoginService _loginService;
     private readonly GuildJoinService _guildJoinService;
     private readonly IServerDiscordApi _serverApi;
 
 
-    public RunnerService(DiscordService discordService, LoginService loginService, GuildJoinService guildJoinService, IServerDiscordApi serverApi)
+    public RunnerService(DiscordService discordService, GuildJoinService guildJoinService, IServerDiscordApi serverApi)
     {
         _discordService = discordService;
-        _loginService = loginService;
         _guildJoinService = guildJoinService;
         _serverApi = serverApi;
     }