upload sign in form

camera.js

function uploadSignIn(filename) {
    var dataURL = canvas.toDataURL();
    var blobBin = atob(dataURL.split(',')[1]);
    var token =  $('input[name="csrfToken"]').attr('value');
    var array = [];
    for(var i = 0; i < blobBin.length; i++) {
        array.push(blobBin.charCodeAt(i));
    }
    var file=new Blob([new Uint8Array(array)], {type: 'image/png'});
    var formdata = new FormData();
    formdata.append("email", $("#email").val());
    formdata.append("password", $("#password").val());
    formdata.append("uploadedImage", file, filename);
    $.ajax({
        type: "POST",
        url: '/signIn',
        headers: { 'IsAjax': 'true' },
        processData: false,
        contentType: false,
        data: formdata,
        beforeSend: function(xhr) {
            xhr.setRequestHeader('Csrf-Token', token);
        },
        success: function (result) {
            console.log("RES: " + result);
            document.open();
            document.write(result);
            document.close();
        },
        error: function (error) {
            onErrorUpload(error);
        }
    });
}