Updates update service even more

ASS.Server/Services/GitCredentialService.cs

@@ -0,0 +1,34 @@
+using LibGit2Sharp;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.Logging;
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace ASS.Server.Services
+{
+    class GitCredentialService
+    {
+        IConfiguration config;
+        ILogger logger;
+
+        public GitCredentialService(IConfiguration globalConfig, ILogger<GitCredentialService> log)
+        {
+            config = globalConfig;
+            logger = log;
+        }
+
+        public Credentials GetCredentials(string url, string usernameFromUrl, SupportedCredentialTypes types)
+        {
+            var uri = new Uri(url);
+            var cleaned = uri.Authority + uri.PathAndQuery + uri.Fragment;
+            var creds = config.GetSection("Repository:Credentials").GetSection(cleaned);
+            if (!string.IsNullOrEmpty(creds["Username"]) && !string.IsNullOrEmpty(creds["Password"]))
+            {
+                return new UsernamePasswordCredentials() { Username = creds["Username"], Password = creds["Password"] };
+            }
+            logger.LogWarning("Failed to get credentials for '{cleaned}'.", cleaned);
+            return null;
+        }
+    }
+}