docs: add session data type to the refresh docs

docs/content/2.configuration/2.nuxt-config.md

@@ -392,6 +392,31 @@ type ProviderRefresh = {
      */
     maxAgeInSeconds?: number,
   },
+  /*
+   * Settings for the session-data that `nuxt-auth` receives from the `getSession` endpoint.
+   */
+  session?: {
+    /**
+     * Define an interface for the session data object that `nuxt-auth` expects to receive from the `getSession` endpoint.
+     *
+     * @default { id: 'string | number' }
+     * @example { id: 'string', name: 'string', email: 'string' }
+     * @advanced_array_example { id: 'string', email: 'string', name: 'string', role: 'admin | guest | account', subscriptions: "{ id: number, status: 'ACTIVE' | 'INACTIVE' }[]" }
+     */
+    dataType?: SessionDataObject;
+    /**
+     * How to extract the session-data from the session response.
+     *
+     * E.g., setting this to `/data/user` and returning an object like `{ data: { user: { id:number, name: string } }, status: 'ok' }` from the `getSession` endpoint will
+     * storing the 'User' object typed as the type created via the 'dataType' prop.
+     *
+     * This follows the JSON Pointer standard, see it's RFC6901 here: https://www.rfc-editor.org/rfc/rfc6901
+     *
+     * @default / Access the root of the session response object
+     * @example /data/user  Access the `data/user` property of the session response object
+     */
+    dataResponsePointer?: string;
+  }
 }
 ```
 ```ts [SessionConfig]