add previous functionality

HanyadikHetVan/Services/HanyadikHetVanJsonService.cs

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+using HanyadikHetVan.DTO;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.Logging;
+
+namespace HanyadikHetVan.Services
+{
+    public class HanyadikHetVanJsonService
+    {
+        private readonly ILogger<HanyadikHetVanJsonService> _logger;
+        private IConfiguration _configuration;
+
+        public HanyadikHetVanJsonService(ILogger<HanyadikHetVanJsonService> logger, IConfiguration configuration)
+        {
+            _configuration = configuration;
+            _logger = logger;
+        }
+
+        public HanyadikHetVanDTO HanyadikHetVan()
+        {
+            return new HanyadikHetVanDTO(_configuration["HanyadikHetVan:StartDate"]);
+        }
+    }
+}

HanyadikHetVan/Services/HanyadikHetVanService .cs

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+using HanyadikHetVan.DTO;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.Logging;
+
+namespace HanyadikHetVan.Services
+{
+    public class HanyadikHetVanService
+    {
+        private readonly ILogger<HanyadikHetVanService> _logger;
+        private IConfiguration _configuration;
+
+        public HanyadikHetVanService(ILogger<HanyadikHetVanService> logger, IConfiguration configuration)
+        {
+            _configuration = configuration;
+            _logger = logger;
+        }
+
+        public int HanyadikHetVan()
+        {
+            return new HanyadikHetVanDTO(_configuration["HanyadikHetVan:StartDate"]).HanyadikHet;
+        }
+    }
+}