Resend Buyer User Invitation
Resend invitation email to the buyer user
        POST
    /buyers/{buyerId}/buyer_users/{buyerUserId}/resend_invitation
  
  curl \
 --request POST 'https://stg.getfoundation.com/api/external/v1/buyers/{buyerId}/buyer_users/{buyerUserId}/resend_invitation' \
 --header "X-API-Key: $API_KEY"