@m2datambww whats the Twitter handle for the user token you’re using in these requests?
For advertiser account 18ce53zik9w your user (@m2datambww) is the owner and has full access.
For advertiser account 18ce53w7bv2 your user (@m2datambww) is an analyst and only has limited read access.
For advertiser account 18ce53wf02o your user (@m2datambww) is an analyst and only has limited read access.
You’ll need to have the Ad Manager role granted to you on the last two accounts. This has to be done by someone with admin access to the advertiser account via the Twitter Ads UI.
Here’s more information about account access and the different roles:
https://dev.twitter.com/ads/overview/obtaining-ads-account-access