Occassionally a nil pointer dereference error is logged in the console backend. It is related to new code where we store the authenticated user in the request context. A helper function `GetUserFromRequestContext` attempts to access the user stored in the request context and cast it to  *User type all in one line, but in some cases the user obejct may not be defined, most likely when authentication has failed. We need to make this function nil safe to prevent the runtime error.

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