如何设置客户端令牌形成我的代码

Question

我将为呼叫api facebook创建应用。 当我运行我的应用程序时。它显示“未找到客户端令牌，请设置客户端令牌”。 我不确定我的代码。 我将编辑我的代码以便工作。 这是我的main Activity（java文件）你能编辑我的代码吗？

public class MainActivity extends AppCompatActivity {

    CallbackManager callbackManager;
    EditText name, password;
    ProgressDialog mDialog;
    ImageView imgAvatar;

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        callbackManager = CallbackManager.Factory.create();
        name = (EditText) findViewById(R.id.Name);
        password = (EditText) findViewById(R.id.Password);

        LoginButton loginButton = (LoginButton) findViewById(R.id.login_button);
        loginButton.setReadPermissions(Arrays.asList("name", "password"));
        loginButton.registerCallback(callbackManager, new FacebookCallback<LoginResult>() {
            @Override
            public void onSuccess(LoginResult loginResult) {
                mDialog = new ProgressDialog(MainActivity.this);
                mDialog.setMessage("Loading Data");

                String accesstoken = loginResult.getAccessToken().getToken();
                GraphRequest request = GraphRequest.newMeRequest(loginResult.getAccessToken(), new GraphRequest.GraphJSONObjectCallback() {
                    @Override
                    public void onCompleted(JSONObject object, GraphResponse response) {
                        mDialog.dismiss();
                        Log.d("response",response.toString());
                        getData(object);

                    }
                });
                Bundle parameters = new Bundle();
                parameters.putString("name","password");
                request.setParameters(parameters);
                request.executeAsync();
            }

            @Override
            public void onCancel() {

            }

            @Override
            public void onError(FacebookException error) {

            }
        });
        if(AccessToken.getCurrentAccessToken()!=null)
        {
            name.setText(AccessToken.getCurrentAccessToken().getUserId());
        }
        printKeyHash();
    }

    private void printKeyHash() {
        try {
            PackageInfo info = getPackageManager().getPackageInfo("com.thpa.a9019.testfacebook", PackageManager.GET_SIGNATURES);
            for (Signature signature : info.signatures) {

                MessageDigest md = MessageDigest.getInstance("SHA");
                md.update(signature.toByteArray());
                Log.d("KeyHash", Base64.encodeToString(md.digest(), Base64.DEFAULT));
            }
        } catch (PackageManager.NameNotFoundException e) {
            e.printStackTrace();
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }
    }

    public int getData(JSONObject object) {
        try {
            URL profile_picture = new URL("https://grap.facebook.com/" + object.getString("id") + "/picture?width=250&height=250");
            Picasso.with(this).load(profile_picture.toString()).into(imgAvatar);

            name.setText(object.getString("name"));
            password.setText(object.getString("password"));

        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (JSONException e) {
            e.printStackTrace();
        }
        return 0;
    } }

我在Stackoverflow中搜索过，但我没有回答。 如何设置客户端令牌形成我的代码。