Password Provider for dynamic password

MQTTnet.Core/ManagedClient/IManagedMqttClientOptions.cs

@@ -10,5 +10,7 @@ namespace MQTTnet.Core.ManagedClient
         TimeSpan AutoReconnectDelay { get; }
 
         IManagedMqttClientStorage Storage { get; }
+
+        Func<IManagedMqttClientOptions, string> PasswordProvider { get; }
     }
 }

MQTTnet.Core/ManagedClient/ManagedMqttClient.cs

@@ -277,6 +277,7 @@ namespace MQTTnet.Core.ManagedClient
 
             try
             {
+                _options.PasswordProvider?.Invoke(_options);
                 await _mqttClient.ConnectAsync(_options.ClientOptions).ConfigureAwait(false);
                 return ReconnectionResult.Reconnected;
             }

MQTTnet.Core/ManagedClient/ManagedMqttClientOptions.cs

@@ -10,5 +10,8 @@ namespace MQTTnet.Core.ManagedClient
         public TimeSpan AutoReconnectDelay { get; set; } = TimeSpan.FromSeconds(5);
 
         public IManagedMqttClientStorage Storage { get; set; }
+
+        public Func<IManagedMqttClientOptions, string> PasswordProvider { get; set; }
+
     }
 }