Gist to get the My Microsoft Teams

content edit web part

<script type="text/javascript" src="/SiteAssets/jquery-1.9.1.js"></script>
<script type="text/javascript" src="/SiteAssets/mymsteams.js"></script>
<div id="mymsteams"></div>

mymsteams.js

$(document).ready(function () {
    //var token = getParameterByName['access_token'];   
    var token = getParameterByName('access_token');

    if (token == null || token == undefined) {
        // On Page load or if token not available on the URL.  
        requestToken();
    }
    else {
        // Token available, extract the data  
        $.ajax({
            url: "https://graph.microsoft.com/beta/me/joinedTeams",
            type: "GET",
            headers: { "Authorization": "Bearer " + token },
            success: function (data) {

                // Extract the data  
                console.log(data);
                var myTeams = "";
                for (var i = 0; i < data.value.length; i++) {
                    if (data.value[i].displayName != null) {
                        myTeams += "<p>" + data.value[i].displayName + "</p>";
                    }
                }
                $("#mymsteams").append(myTeams);
            },
            error: function (sender, args) {
                console.log("error");
            }
        });

    }
});

// Extract the access token from the URL  
function getParameterByName(name, url) {
    if (!url) url = window.location.href;
    name = name.replace(/[\[\]]/g, "\\$&");
    var regex = new RegExp("[?&#]" + name + "(=([^&#]*)|&|#|$)"),
        results = regex.exec(url);
    if (!results) return null;
    if (!results[2]) return '';
    return decodeURIComponent(results[2].replace(/\+/g, " "));
}

// Get the token using the redirect URL  
function requestToken() {
    var clientId = '9921bb32-b288-465b-9f74-11222f28534a';
    var replyUrl = 'https://nakkeerann.sharepoint.com/Pages/trainingpage.aspx';
    var resource = "https://graph.microsoft.com";
    var authServer = 'https://login.microsoftonline.com/nakkeerann.onmicrosoft.com/oauth2/authorize?';
    var responseType = 'token';

    var url = authServer +
        "response_type=" + encodeURI(responseType) + "&" +
        "client_id=" + encodeURI(clientId) + "&" +
        "resource=" + encodeURI(resource) + "&" +
        "redirect_uri=" + encodeURI(replyUrl);
    // Redirect to the URL, which will have access token on successful authentication  
    window.location = url;
}