<div class="userInfo" style="display:none;">
    <p>Вы вошли как: <span class="userName"></span></p>
    <input type="button" value="Выйти" id="logOut" />
</div>
<div class="loginForm">
    <h3>Вход на сайт</h3>
    <label>Введите email</label><br />
    <input type="email" id="emailLogin" /> <br /><br />
    <label>Введите пароль</label><br />
    <input type="password" id="passwordLogin" /><br /><br />
    <input type="submit" id="submitLogin" value="Логин" />
</div>

<script
  src="https://code.jquery.com/jquery-3.2.1.min.js"
  integrity="sha256-hwg4gsxgFZhOsEEamdOYGBf13FyQuiTwlAQgxVSNgt4="
  crossorigin="anonymous"></script>
<script type="text/javascript">
    $(function () {
        //...........................

        var tokenKey = "tokenInfo";
        $('#submitLogin').click(function (e) {
            e.preventDefault();
            var loginData = {
                grant_type: 'password',
                username: $('#emailLogin').val(),
                password: $('#passwordLogin').val()
            };

            $.ajax({
                type: 'POST',
                url: 'http://134.249.120.107/Token',
                data: loginData,
                success: function(data) {
                    console.log(data.access_token);
                }
            });
        });

        $('#logOut').click(function (e) {
            e.preventDefault();
            sessionStorage.removeItem(tokenKey);
        });
    })
</script>