auth/maskinporten: describe resource indicator for texas

docs/auth/maskinporten/how-to/consume.md

@@ -52,6 +52,12 @@ To acquire a token, you can either:
 {% set target_description = 'Whitespace-separated list of scopes that you want in the issued token from Maskinporten.' %}
 {% include 'auth/partials/token.md' %}
 
+If the API provider requires the use of an [audience-restricted token](https://docs.digdir.no/maskinporten_func_audience_restricted_tokens.html), you must also include the following parameter in the request:
+
+| Parameter    | Example Value                       | Description                                                                                                                       |
+|:-------------|:------------------------------------|:----------------------------------------------------------------------------------------------------------------------------------|
+| `resource`   | `https://some-provider.example/api` | Target audience for the token returned by Maskinporten. The exact value is defined by the API provider and exchanged out-of-band. |
+
 ### Acquire tokens manually
 
 To acquire a token from Maskinporten, you will need to create a [client assertion](../../explanations/README.md#client-assertion).