feat: add user management, refs NOISSUE

song_of_the_day/Auth/LdapAuthenticationService.cs

@@ -0,0 +1,15 @@
+public class LdapAuthenticationService : IAuthenticationService
+{
+    private readonly IConfiguration _configuration;
+
+    public LdapAuthenticationService(IConfiguration configuration)
+    {
+        _configuration = configuration;
+    }
+
+    public bool Authenticate(string username, string password)
+    {
+        var ldapInstance = LdapIntegration.Instance;
+        return ldapInstance.TestLogin(username, password);
+    }
+}