Implemented token fetch

PostFundManagement.Infrastructure/Configuration/MachineIdentity.cs

@@ -0,0 +1,12 @@
+namespace PostFundManagement.Infrastructure.Configuration;
+
+public sealed class MachineIdentity
+{
+    public string? Authority { get; set; }
+
+    public string? Audience { get; set; }
+
+    public string? ClientId { get; set; }
+
+    public string? ClientSecret { get; set; }
+}