only gen doc if token is set
only gen doc if token is set

cuhkshenzhen/CUHKSZLib,cuhkshenzhen/CUHKSZLib,Yexiaoxing/CUHKSZLib,alesiong/CUHKSZLib,Yexiaoxing/CUHKSZLib,cuhkshenzhen/CUHKSZLib,alesiong/CUHKSZLib,Yexiaoxing/CUHKSZLib,alesiong/CUHKSZLib