Hi Sai Teja,
It seems a problem with Adwords API just happened. Since yesterday, all our user having Standard Access (to MCC adwords accounts) having this AuthorizationError.USER_PERMISSION_DENIED api exception.
Can you please take a look. I just posted a new question regarding this issue. Our company is using about 350 google adwords accounts, so we need this to fix asap.
Many thanks,
Sang