Sencha Architect 4-ExtJS 6.5->Dreamfactory 2.9身份验证会话令牌

我有点卡住了,我想征求你的意见,我正在尝试使用Sencha Architect中的DreamFactory设置一个登录窗口//身份验证,但我几乎是一个初学者。

我当前的代码是:

var username = Ext.getCmp('usr').getValue(),
password = Ext.getCmp('pwd').getValue();

Ext.Ajax.defaultHeaders = {
'X-DreamFactory-Api-Key' : 'xyz',
'Content-Type' : 'application/json'
};

Ext.Ajax.request({
url: 'http://dreamfactoryaddy:8080/api/v2/user/session',
withCredentials: true,
email: username,
password: password,
cors: true,

success: function(response) {
    var obj = Ext.decode(response.responseText);
    Ext.Ajax.defaultHeaders = {
        'X-DreamFactory-Api-Key' : 
'xyz', 'Content-Type' : 'application/json', 'X-DreamFactory-Session-
Token': obj.session_token
    };
    console.log(obj);
},

failure: function(response) {
        console.log(response.responseText);
}

});

我收到此错误:

{"error":{"code":401,"context":null,"message":"There is no valid session for the current request.","status_code":401}}

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更新2:

            var username = Ext.getCmp('usr').getValue(),
                password = Ext.getCmp('pwd').getValue(),
                headers = {
                    'X-DreamFactory-Api-Key' : 'xyz',
                    'Content-Type' : 'application/json'
                };

            Ext.Ajax.setDefaultHeaders(headers);
            Ext.Ajax.request({
                url: 'http://chalton.swiftmedia.ca:8080/api/v2/user/session',
                withCredentials: true,
                jsonData: {
                    "email" : username,
                    "password" : password
                },
                cors: true,

                success: function(response) {
                    var obj = Ext.util.JSON.decode(response.responseText),
                        newheaders = {
                            'X-DreamFactory-Api-Key' : 'xyz',
                            'Content-Type' : 'application/json',
                            'X-DreamFactory-Session-Token': obj.session_token
                        };
                    console.log(response.responseText);
                    Ext.Ajax.setDefaultHeaders(newheaders);
                },

                failure: function(response) {
                    console.log(response.responseText);
                }

            });
        },