Reconcile MakeAuthOptions and PopulateAuthOptions

These functions are used in separate places and appear to have similar intent, but while PopulateAuthOptions preserves the existing options its given, MakeAuthOptions discards them. This seems incorrect on the surface, but there may be reasons why it behaves this way. Further investigation is needed to determine if MakeAuthOptions can be changed to preserve the options passed in and/or the two functions could be merged.

找到 MakeAuthOptions 和 PopulateAuthOptions，然后比较它们各自如何处理接收到的选项，以及每个函数的使用位置。确定保留现有选项是否安全，以及是否可以合并这两个函数；完成标准是记录行为决策，并验证受影响的身份验证路径。

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