Added a new policy to require being an admin. Implemented ability to delete a user.

API/Extensions/IdentityServiceExtensions.cs

@@ -35,6 +35,11 @@ namespace API.Extensions
                         ValidateAudience = false
                     };
                 });
+            services.AddAuthorization(opt =>
+            {
+                opt.AddPolicy("RequireAdminRole", policy => policy.RequireRole("Admin"));
+            });
+            
             return services;
         }
     }