SendMSG

function sendMsg() {

        requester.listAllUsers()
            .then((response) => {
                    $('#msgRecipientUsername').empty();
                        for (let data of response) {
                            if (data.name) {
                                $('#msgRecipientUsername').append($('<option>', {
                                    value: data.username,
                                    text: data.username + ' (' + data.name + ')'
                                }));
                            } else {
                                $('#msgRecipientUsername').append($('<option>', {
                                    text: data.username
                                }));
                            }
                        }
            }).catch(handleAjaxError);

        $("#formSendMessage").submit((event) => {
            event.preventDefault();
            let username = sessionStorage.getItem('username');
            let name = sessionStorage.getItem('name');
            let recipient_username = $('#msgRecipientUsername').find(":selected").attr('value');
            let text = $('#msgText').val();
            requester.sendMessage(username,name,recipient_username, text).then((response) => {
                showView('viewMyMessages');
                // showMyMessagesView();
            })
        });
    }