🔀 ✨ feat: allow GraphServiceClient to be passed in (#143)

* Add new constructor allowing the GraphServiceClient to be passed in

* Add new signature to AddGraphSender allowing GraphServiceClient to be passed in

Co-authored-by: Kenneth Scott <k_e_n_n_e_t_h_s_c_o_t_t@hotmail.com>

Author: KennethScott

src/FluentEmail.Graph/FluentEmailServicesBuilderExtensions.cs

@@ -3,6 +3,7 @@
     using FluentEmail.Core.Interfaces;
     using Microsoft.Extensions.DependencyInjection;
     using Microsoft.Extensions.DependencyInjection.Extensions;
+    using Microsoft.Graph;
 
     /// <summary>
     /// Contains extension methods to register the <see cref="GraphSender"/> with the <c>FluentEmailServicesBuilder</c> from <c>FluentEmail.Core</c>.
@@ -31,5 +32,13 @@ public static FluentEmailServicesBuilder AddGraphSender(
             };
             return builder.AddGraphSender(options);
         }
+
+        public static FluentEmailServicesBuilder AddGraphSender(
+            this FluentEmailServicesBuilder builder,
+            GraphServiceClient graphClient)
+        {
+            builder.Services.TryAdd(ServiceDescriptor.Scoped<ISender>(_ => new GraphSender(graphClient)));
+            return builder;
+        }
     }
 }

src/FluentEmail.Graph/GraphSender.cs

@@ -31,6 +31,11 @@ public GraphSender(GraphSenderOptions options)
             this.graphClient = new (spn);
         }
 
+        public GraphSender(GraphServiceClient graphClient)
+        {
+            this.graphClient = graphClient;
+        }
+
         public SendResponse Send(IFluentEmail email, CancellationToken? token = null)
         {
             return this.SendAsync(email, token)