GroupMembership plugin wrongly describes reference as username not user

Problem

The group membership content enable plugin group/src/Plugin/GroupContentEnabler/GroupMembership.php has this annotation:

*   reference_label = @Translation("Username"),
 *   reference_description = @Translation("The name of the user you want to make a member"),

This is used in the GroupContent class to describe a field that references a user:

      $fields['entity_id'] = BaseFieldDefinition::create('entity_reference')
        ->setLabel($plugin->getEntityReferenceLabel() ?: $original->getLabel())
        ->setDescription($plugin->getEntityReferenceDescription() ?: $original->getDescription())

Describing this field as a username is arguably inaccurate, and possibly confusing if a widget is used that doesn't use usernames.

Solution

I would suggest:

*   reference_label = @Translation("User"),
*   reference_description = @Translation("The user you want to make a member"),