Hi Sanket,
Thank you for reaching out. Do both of your accounts have the same manager account? It looks like the manager account for the account you provided (280-805-1655) only has Test Access on their developer token so you will be unable to make API calls with this account. I'm unfamiliar with Supermetrics but if it requires you to have API access, this could be the reason it isn't working as expected.
Regards,
Mitchell
Google Ads API Team
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