Update rest_client.py
Update rest_client.py

andrewchenshx/vnpy,bigdig/vnpy,bigdig/vnpy,msincenselee/vnpy,andrewchenshx/vnpy,msincenselee/vnpy,msincenselee/vnpy,bigdig/vnpy,andrewchenshx/vnpy,vnpy/vnpy,bigdig/vnpy,andrewchenshx/vnpy,vnpy/vnpy,msincenselee/vnpy,andrewchenshx/vnpy