{ code: 124, message: 'Invalid access token.' }, Account-level app

@kantshri561,

Thank you for posting in the Developer Forum. It looks like the Access token being used in your request is not valid. Have you validated that you are generating the access token correctly?

As a test, I’d recommend using a tool like a postman to generate an access token, then using that token to make your request. Here’s a helpful guide you can reference for using OAuth with Postman: