Use the auth

Author: damienbod

aspnetcore/security/authentication/configure-jwt-bearer-authentication.md

@@ -210,6 +210,28 @@ services.AddAuthentication(options =>
 	};
 });
 ```
+### Forcing the bearer authentication
+
+The **SetFallbackPolicy** can be used to require an authentication if no policy is defined. 
+
+```csharp
+var requireAuthPolicy = new AuthorizationPolicyBuilder()
+	.RequireAuthenticatedUser()
+	.Build();
+
+builder.Services.AddAuthorizationBuilder()
+	.SetFallbackPolicy(requireAuthPolicy);
+```
+
+The **Authorize** attribute can alos be used to force the authentication. If multiple schemes are used, the bearer scheme needs to be set.
+
+```csharp
+[Authorize]
+[ApiController]
+[Route("[controller]")]
+public class WeatherForecastController : ControllerBase
+{
+```
 
 ## Recommended approaches to create a JWT