License Gen and Verification added to core

RelayCore/Services/APIAuthService.cs

@@ -1,4 +1,5 @@
-using Newtonsoft.Json;
+using Microsoft.AspNetCore.WebUtilities;
+using Newtonsoft.Json;
 using RelayCore.Endpoints;
 using RelayCore.Enums;
 using RelayCore.Models;
@@ -97,4 +98,29 @@ public class APIAuthService(SurrealDbClient _db)
 
         return true;
     }
+
+    public async Task<string?> ServerLicenseGenerate(AuthServerLicenseGenerate request)
+    {
+        var hasher = new PasswordHasher();
+        string token = null;
+        token = hasher.HashPassword(DateTime.Now.ToString("yyyyMMddHHmmss"));
+        var created = await _db.Create("auth_licenses", new DBLicense
+        {
+            Token = token,
+            IsClient =  false,
+            CreatedAt = DateTime.UtcNow,
+            ExpiresAt = DateTime.UtcNow.AddDays(365),
+            IsExpired = false,
+        });
+        return token;
+    }
+
+    public async Task<bool> ServerVerifyLicense(AuthServerLicenseVerify request)
+    {
+        var tokens = await _db.Select<DBLicense>("auth_licenses");
+        var token = tokens.FirstOrDefault(x => x.Token == request.License);
+        if (token != null)
+            return true;
+        return false;
+    }
 }