By Michelle Nichols UNITED NATIONS (Reuters) – U.N. Secretary-General Antonio Guterres told Chinese leaders on Saturday that he expected authorities to allow U.N. human rights chief Michelle Bachelet to make a “credible visit” to the country, including Xinjiang, the United Nations said. Guterres met with China’s President Xi Jinping and Foreign Minister Wang Yi on the sidelines of the Winter Olympics, according to a U.N. readout of the meetings. Bachelet has long sought access to Xinjiang to investigate accusations of abuse against ethnic Uyghurs. The issue has soured relations between Beijing…