在此代码中，根据用户的角色限制对特定url的访问，并指出对未登录用户使用的身份验证机制。
In this code, we are limiting access to a certain URL based on a given user's role and telling which authentication mechanism to use for someone who is not logged in.
当前，我国公务员激励机制在选拔与录用、薪酬管理、绩效考核以及培训等方面仍存在一定问题。
At present, there still exist some problems in selection and employment, salary management, performance appraisal and training.
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