环信demo中注册的账号，能正常登录，在apkplug提供的环信插件中调用登录接口登录，提示用户不存在，请高手帮忙解惑

以下是调用插件登录接口的代码

BundleRPCAgent agent = new BundleRPCAgent(FrameworkFactory.getInstance().getFrame().getSystemBundleContext()); try { final IEaseInstance easeInstance = agent.syncCall("apkplug://measeplug/rpc/instance",IEaseInstance.class); easeInstance.loginByCode("xxxx", "xxxx", new Action2() { @Override public void call(Boolean aBoolean, String s) { if(!aBoolean){ return; } runOnUiThread(new Runnable() { @Override public void run() { textView.setText(textView.getText()+"\n环信登陆成功"); } }); startChatActivity("com.apkplug.easemobplug.ui.LoginActivity"); } }); } catch (Throwable throwable) { throwable.printStackTrace(); }