removed possible null reference

watcher-monitoring/Controllers/ApiController.cs

@@ -154,25 +154,26 @@ public class APIController : Controller
             // Find Server in Database
             var server = await _context.Servers.FindAsync(dto.Id);
 
-            // Add Hardware Configuration
+            if (server == null)
-            try
             {
+                _logger.LogError("Server nicht gefunden");
+                return BadRequest("Server not found");
+            }
+
+            // Add Hardware Configuration
             server.CpuType = dto.CpuType;
             server.CpuCores = dto.CpuCores;
             server.GpuType = dto.GpuType;
             server.RamSize = dto.RamSize;
             // Diskspace fehlt
 
+            await _context.SaveChangesAsync();
             _logger.LogInformation("Harware configuration successfull for server {server}", server.Name);
         }
         catch (Exception ex)
         {
             _logger.LogError(ex.Message);
-            }
+            return BadRequest(ex.Message);
-        }
-        catch (Exception ex)
-        {
-            _logger.LogError(ex.Message);
         }