Add support for Basic Authentication (#18)

Add support for Basic Authentication when your rqlite node is configured to require it. Not used by default

RqliteDotnet/RqliteClient.cs

@@ -8,9 +8,20 @@ public class RqliteClient : IRqliteClient
 {
     private readonly HttpClient _httpClient;
 
-    public RqliteClient(string uri, HttpClient? client = null)
+    /// <summary>
+    /// Returns new RqliteClient
+    /// </summary>
+    /// <param name="uri">URI where rqlite instance is running</param>
+    /// <param name="client">Http client to use instead of default one</param>
+    /// <param name="basicAuthInfo">Basic auth string (username:password) that is base64 encoded and sent in Authorization header. If empty the header is not sent</param>
+    public RqliteClient(string uri, HttpClient? client = null, string basicAuthInfo = "")
     {
         _httpClient = client ?? new HttpClient(){ BaseAddress = new Uri(uri) };
+        if (!string.IsNullOrEmpty(basicAuthInfo))
+        {
+            var encoded = Convert.ToBase64String(Encoding.UTF8.GetBytes(basicAuthInfo));
+            _httpClient.DefaultRequestHeaders.Add("Authorization", $"Basic {encoded}");
+        }
     }
 
     public RqliteClient(HttpClient client)

RqliteDotnet/RqliteOrmClient.cs

@@ -5,8 +5,6 @@ namespace RqliteDotnet;
 
 public class RqliteOrmClient : RqliteClient, IRqliteOrmClient
 {
-    public RqliteOrmClient(HttpClient client) : base(client) { }
-
     public RqliteOrmClient(string uri, HttpClient? client = null) : base(uri, client) {}
 
     /// <inheritdoc />

RqliteDotnetExample/Program.cs

@@ -5,9 +5,10 @@ namespace RqliteDotnetExample;
 
 public static class RqliteDotnetExample
 {
-    public static void Main(string[] args)
+    public static async Task Main(string[] args)
     {
         var x = new RqliteClient("http://localhost:4001");
-        Console.WriteLine(x.Ping().Result);
+        var ping = await x.Ping();
+        Console.WriteLine(ping);
     }
 }