Link github user name to github account in user profile

[holybiber]

This should be possible with something like

/**
 * Implements hook_ENTITY_TYPE_view().
 */
function TODO_node_view(array &$build, EntityInterface $entity, EntityViewDisplayInterface $display, $view_mode)
{
  if ($display->getComponent('field_github_name')) {
      $build['field_github_name'] = [
        '#type' => 'markup',
        '#markup' => TODO sanitize and make link to github,
    ];
  }
}