Open an instance of the inbox page for the logged in user.

def open_inbox_page(self, content_type):
        """
        Open an instance of the inbox page for the logged in user.
        """
        from .inbox_page import InboxPage

        with self.term.loader('Loading inbox'):
            page = InboxPage(self.reddit, self.term, self.config, self.oauth,
                             content_type=content_type)
        if not self.term.loader.exception:
            return page