NOTE: This ticket does NOT include any interactions for the participant to switch between public and private registration. It is read-only. We will handle switching between registration status separately.
//As a campaign participant, if I register privately, I want my username to only be displayed to me and the campaign organizers in EventDetails, so that I can register with confidentiality.//
**Acceptance Criteria:**
* If a participant registers privately, their username should only be displayed to themselves and the campaign organizers
* The total number of privately registered participants should be displayed for non-organizers when viewing EventDetails
* Organizers see a padlock icon beside the usernames of participants who registered privately
**Visual examples:**
**Organizer view**
{F35550275, size=full}
**Participant view**
Participants see only the total number of such participants at the bottom of the participant list
{F35550274, size=full}