refactor: transfer logic

All logic related to token manipulation has been transferred to the AuthService. Also added TOTP 2FA and rethought the logic of logging into the application

Security/Services/TotpService.cs

@@ -0,0 +1,20 @@
+using OtpNet;
+
+namespace Mirea.Api.Security.Services;
+
+public class TotpService
+{
+    private readonly Totp _totp;
+
+    public TotpService(string secret)
+    {
+        var secretBytes = Base32Encoding.ToBytes(secret);
+        _totp = new Totp(secretBytes);
+    }
+
+    public string GenerateToken() =>
+        _totp.ComputeTotp();
+
+    public bool VerifyToken(string token) =>
+        _totp.VerifyTotp(token, out _, new VerificationWindow(2, 2));
+}