azure Rest API to get auth token fails #azure

tried the rest api

https://login.microsoftonline.com/common/Oauth2/authorize?client_id=9ba1a5c7-f17a-4de9-a1f1-6178c8d51223&response_type=code&redirect_uri=https%3F%2F%2Fmanagement.azure.com%2F

to get the auth code but I am getting the following response.

{returnResult=

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html class="win-hoverable" xmlns="http://www.w3.org/1999/xhtml" dir="ltr" style="background-color: rgb(0, 114, 198);" lang="iv" xml:lang="iv">

Error ``` ``` ```

Sorry, but we’re having trouble signing you in.

We received a bad request.

Additional technical information:

Correlation ID: 8e629c06-6b61-4422-95dd-8193b4811bda

Timestamp: 2016-05-10 13:13:23Z

AADSTS90011: 'redirect_uri' value must be a valid absolute Uri.


</html>;Result=

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html class="win-hoverable" xmlns="http://www.w3.org/1999/xhtml" dir="ltr" style="background-color: rgb(0, 114, 198);" 
    lang="iv"
    xml:lang="iv">
    <head>
        <title>Error</title>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
        <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />
        <meta http-equiv="Pragma" content="no-cache" />
        <meta http-equiv="Expires" content="-1" />
        <meta http-equiv="X-UA-Compatible" content="IE=edge" />
        <meta name="PageID" content="i5030.2.0" />
        <meta name="SiteID" content="501148" />
        <meta name="ReqLC" content="1033" />
        <meta name="LocLC" content="1033" />
        <meta name="mswebdialog-newwindowurl" content="*" />

<script src="https://secure.aadcdn.microsoftonline-p.com/ests/2.1.2922.0/content/cdnbundles/jquery.1.11.min.js"></script>

    <link rel="SHORTCUT ICON" href="https://secure.aadcdn.microsoftonline-p.com/ests/2.1.2922.0/content/images/favicon_a.ico" />


<link href="https://secure.aadcdn.microsoftonline-p.com/ests/2.1.2922.0/content/cdnbundles/login.min.css" rel="stylesheet" />

<script src="https://secure.aadcdn.microsoftonline-p.com/ests/2.1.2922.0/content/cdnbundles/aad.login.min.js"></script>

    <script type="text/javascript">
        if (navigator.userAgent.match(/IEMobile\/10\.0/)) {
            var msViewportStyle = document.createElement("style");
            msViewportStyle.appendChild(
                document.createTextNode(
                    "@-ms-viewport{width:auto!important}"
                )
            );
            msViewportStyle.appendChild(
                document.createTextNode(
                    "@-ms-viewport{height:auto!important}"
                )
            );
            document.getElementsByTagName("head")[0].appendChild(msViewportStyle);
        }
    </script>