Add support for chaning passwords

MQTTnet.Core/Client/BaseMqttClientOptions.cs

@@ -3,20 +3,18 @@ using MQTTnet.Core.Serializer;
 
 namespace MQTTnet.Core.Client
 {
-    public abstract class BaseMqttClientOptions : IMqttClientOptions
+    public class MqttClientOptions : IMqttClientOptions
     {
         public MqttClientTlsOptions TlsOptions { get; set; } = new MqttClientTlsOptions();
 
         public MqttApplicationMessage WillMessage { get; set; }
 
-        public string UserName { get; set; }
-
-        public string Password { get; set; }
-
         public string ClientId { get; set; } = Guid.NewGuid().ToString("N");
 
         public bool CleanSession { get; set; } = true;
 
+        public IMqttClientCredentials Credentials { get; set; } = new MqttClientCredentials();
+
         public TimeSpan KeepAlivePeriod { get; set; } = TimeSpan.FromSeconds(5);
 
         public TimeSpan DefaultCommunicationTimeout { get; set; } = TimeSpan.FromSeconds(10);

MQTTnet.Core/Client/IMqttClientCredentials.cs

@@ -0,0 +1,8 @@
+namespace MQTTnet.Core.Client
+{
+    public interface IMqttClientCredentials
+    {
+        string Password { get; }
+        string Username { get; }
+    }
+}

MQTTnet.Core/Client/IMqttClientOptions.cs

@@ -5,14 +5,14 @@ namespace MQTTnet.Core.Client
 {
     public interface IMqttClientOptions
     {
-        bool CleanSession { get; }
         string ClientId { get; }
+        bool CleanSession { get; }
+        MqttApplicationMessage WillMessage { get; }
+        IMqttClientCredentials Credentials { get; }
+
         TimeSpan DefaultCommunicationTimeout { get; }
         TimeSpan KeepAlivePeriod { get; }
-        string Password { get; }
         MqttProtocolVersion ProtocolVersion { get; }
         MqttClientTlsOptions TlsOptions { get; }
-        string UserName { get; }
-        MqttApplicationMessage WillMessage { get; }
     }
 }

MQTTnet.Core/Client/MqttClient.cs

@@ -186,8 +186,8 @@ namespace MQTTnet.Core.Client
             var connectPacket = new MqttConnectPacket
             {
                 ClientId = _options.ClientId,
-                Username = _options.UserName,
-                Password = _options.Password,
+                Username = _options.Credentials?.Username,
+                Password = _options.Credentials?.Password,
                 CleanSession = _options.CleanSession,
                 KeepAlivePeriod = (ushort)_options.KeepAlivePeriod.TotalSeconds,
                 WillMessage = willApplicationMessage

MQTTnet.Core/Client/MqttClientCredentials.cs

@@ -0,0 +1,9 @@
+namespace MQTTnet.Core.Client
+{
+    public class MqttClientCredentials : IMqttClientCredentials
+    {
+        public string Username { get; set; }
+
+        public string Password { get; set; }
+    }
+}

MQTTnet.Core/Client/MqttClientTcpOptions.cs

@@ -1,6 +1,6 @@
 namespace MQTTnet.Core.Client
 {
-    public class MqttClientTcpOptions : BaseMqttClientOptions
+    public class MqttClientTcpOptions : MqttClientOptions
     {
         public string Server { get; set; }
 

MQTTnet.Core/Client/MqttClientWebSocketOptions.cs

@@ -3,7 +3,7 @@ using System.Net;
 
 namespace MQTTnet.Core.Client
 {
-    public class MqttClientWebSocketOptions : BaseMqttClientOptions
+    public class MqttClientWebSocketOptions : MqttClientOptions
     {
         public string Uri { get; set; }