尝试保存到Firebase数据库但收到未定义的错误

Question

希望获得一些帮助，以便将数据保存到Firebase数据库。我在控制台中收到此错误＆＃34;第一个参数包含未定义的属性＆＃34;。任何帮助或建议解决这个问题都将受到大力赞赏。

//Edit Profile

document.getElementById("profileSubmit").addEventListener('click', function(){

            var user = firebase.auth().currentUser;
            var name, email, photoUrl, uid;

            if (user != null) {
              name = user.displayName;
              email = user.email;
              photoUrl = user.photoURL;
              uid = user.uid;  
            }


            var username= document.getElementById("username");
            var pathway= document.getElementById("pathway");
            var avatar= document.getElementById("avatar");

                if(username !== "" && pathway !== ""){

                // Gets the users input
                var getUsername = username.value;
                var getPathway = pathway.value;
                //var getAvatar =  avatar.value; 

                var editRef= firebase.database().ref("Users/" );

                    editRef.child(uid).set({
                        DisplayName: getUsername,
                        Pathway: getPathway,
                    })

                //Updates Firebase profile
                user.updateProfile({
                    displayName: getUsername
                })

                        $('#successBox').show();
                        $('#successBox').fadeOut(5000); 

                        $('#username').val("");
                        $('#pathway').val("");

                }   //else {

                    //  $('#errorBox').show();
                        //$('#errorBox').fadeOut(5000); 

                    //}
          });