The Error "Unable to get user context"

I am getting this error

Error: The data is not obtainable due to following:{"data":null,"pagination":null,"error":{"errors":[{"messageCode":"FORBIDDEN","message":"Unable to get user context","field":""}]}}, STATUS_CODE: 403

I am a Data Engineer, and I am getting data for campaigns with keywords using the Apple Search Ads API. There is a long list of keywords, and its so long that the Access Token expires since its set for one hour.

So for every POST request I make, I change the access token, so could this be the issue that I am changing too many times...

I haven't made a refresh token because it needs a redirect_url, and I am not using this data for an APP, its for a datawarehouse...

I hope someone can help me with this part