Add agent approle method example (hashicorp#12297)

website/content/docs/agent/autoauth/methods/approle.mdx

@@ -23,7 +23,8 @@ cached.
 - `secret_id_file_path` `(string: optional)` - The path to the file with secret
   ID.
   If not set, only the `role-id` will be used. \
-  In that case, the AppRole should have `bind_secret_id` set to `false` otherwise Vault Agent wouldn't be able to login.
+  In that case, the AppRole should have `bind_secret_id` set to `false` otherwise 
+  Vault Agent wouldn't be able to login.
 
 - `remove_secret_id_file_after_reading` `(bool: optional, defaults to true)` -
   This can be set to `false` to disable the default behavior of removing the
@@ -35,3 +36,63 @@ cached.
   containing the output of the secret ID retrieval endpoint for the role (e.g.
   `auth/approle/role/webservers/secret-id`) and the creation path for the
   response-wrapping token must match the value set here.
+
+## Example Configuration
+
+An example configuration, using approle to enable [auto-auth](/docs/agent/autoauth) 
+and creating both a plaintext token sink and a [response-wrapped token sink file](/docs/agent/autoauth#wrap_ttl), follows:
+
+```python
+pid_file = "./pidfile"
+
+vault {
+  address = "https://127.0.0.1:8200"
+}
+
+auto_auth {
+  method {
+    type      = "approle"
+
+    config = {
+      role_id_file_path = "roleid"
+      secret_id_file_path = "secretid"
+      remove_secret_id_file_after_reading = false
+    }
+  }
+
+  sink {
+    type = "file"
+    wrap_ttl = "30m"
+    config = {
+      path = "sink_file_wrapped_1.txt"
+    }
+  }
+
+  sink {
+    type = "file"
+    config = {
+      path = "sink_file_unwrapped_2.txt"
+    }
+  }
+}
+
+
+cache {
+  use_auto_auth_token = true
+}
+
+listener "tcp" {
+  address = "127.0.0.1:8100"
+  tls_disable = true
+}
+
+template {
+  source      = "/etc/vault/server.key.ctmpl"
+  destination = "/etc/vault/server.key"
+}
+
+template {
+  source      = "/etc/vault/server.crt.ctmpl"
+  destination = "/etc/vault/server.crt"
+}
+```