DELETE
    /buyers/{buyerId}/buyer_users/{buyerUserId}
  
  curl \
 --request DELETE 'https://stg.getfoundation.com/api/external/v1/buyers/{buyerId}/buyer_users/{buyerUserId}' \
 --header "X-API-Key: $API_KEY"
    curl \
 --request DELETE 'https://stg.getfoundation.com/api/external/v1/buyers/{buyerId}/buyer_users/{buyerUserId}' \
 --header "X-API-Key: $API_KEY"