Change Details

===Acceptance criteria=== * Given a user tries to remove participants using the [[https://www.mediawiki.org/wiki/Extension:CampaignEvents/Api#Remove_participants_from_an_event | "Email Remove participants from an event" ]] API endpoint ** And the event does not belong to the current wiki ** Then they should receive a 4xx response with an error message similar to that used in T358781 ** And this new error should be documented on mediawiki.org

===Acceptance criteria=== * Given a user tries to remove participants using the [[https://www.mediawiki.org/wiki/Extension:CampaignEvents/Api#Remove_participants_from_an_event | "Remove participants from an event" ]] API endpoint ** And the event does not belong to the current wiki ** Then they should receive a 4xx response with an error message similar to that used in T358781 ** And this new error should be documented on mediawiki.org

===Acceptance criteria=== * Given a user tries to remove participants using the [[https://www.mediawiki.org/wiki/Extension:CampaignEvents/Api#Remove_participants_from_an_event | "Email Remove participants from an event" ]] API endpoint ** And the event does not belong to the current wiki ** Then they should receive a 4xx response with an error message similar to that used in T358781 ** And this new error should be documented on mediawiki.org