Restrict account settings route access to owner/admin

    "ConfigEntityListBuilder",

    "EntityDeleteForm",

    "EntityForm",

    "BlockBase"

    "BlockBase",

    "drupalcon",

    "staticflickr",

    "dateupload",

    "recenttracks",

    "mymodule",

    "flickruser",

    "overwriter",

    "deleter",

    "dedup",

    "Dedup",

    "testuser",

    "somekey",

    "twitteruser",

    "addtogroup",

    "endcode",

    "unserialized"

  ]

}

2. **Add per-user config fields** in `hook_form_actstream_accounts_form_alter()` — append fields to the accounts form and attach a submit handler that calls `actstream_account_save()`.

3. **Fetch items** in `hook_actstream_SERVICE_items_fetch()` — contact the remote API and return normalised item arrays. Each item needs `title`, `body`, `link`, `timestamp`, `guid`, and ideally `raw`.

3. **Fetch items** in `hook_actstream_SERVICE_items_fetch()` — contact the remote API and return normalized item arrays. Each item needs `title`, `body`, `link`, `timestamp`, `guid`, and ideally `raw`.

4. **Optionally alter items** in `hook_actstream_SERVICE_items_alter()` — filter, enrich, or reorder items before they are saved.

 * hook_actstream_github_items_fetch().

 *

 * This hook is called during cron and on manual refresh. It should contact

 * the remote API and return an array of normalised item arrays.

 * the remote API and return an array of normalized item arrays.

 *

 * Each item array must contain the following keys:

 * - title (string, required): Short human-readable title used as the entity

 *   provided by the remote service. Used for de-duplication. If the service

 *   does not provide a GUID, use the canonical link URL.

 * - raw (string, desired): The verbatim service response for this item

 *   (serialised JSON, XML, etc.) stored in the actstream_raw field for

 *   (serialized JSON, XML, etc.) stored in the actstream_raw field for

 *   archiving and future re-processing. Omitting this key is allowed but

 *   discouraged.

 *

 * @endcode

 */

function hook_preprocess_actstream_item(array &$variables): void {

  /** @var \Drupal\actstream\Entity\ActivityStreamItem $item */

  $item    = $variables['actstream_item'];

  $service = $variables['service'];

  // Example: append the service name to the object link title.

    _form: '\Drupal\actstream\Form\ActivityStreamAccountsForm'

    _title: 'Activity Stream accounts'

  requirements:

    _permission: 'access content'

    _entity_access: 'user.update'

  options:

    parameters:

      user:

   * Returns the list of service IDs to aggregate for this event.

   *

   * @return string[]

   *   The service IDs.

   */

  public function getServices(): array;