we currently building an app, the goal is to provide our customers who are amazon advertisers with a customized dashboard to manage their own Amazon data, we create LWA by following these steps https://advertising.amazon.com/API/docs/en-us/setting-up/step-1-create-lwa-app. So far we successfully onboarded a new advertiser by authorizing our app by the advertiser through LWA and we are able to pull the advertiser's data like Sponsored Products, Sponsored Videos and Sponsored Display using the advertiser profileID. We are planning to integrate hundred of advertisers into our app. We tried to onboard a second advertiser before we push our app in production, however, we are stuck in getting the new advertiser's profileID.Actually the authorization through LWA was successful for this second advertiser, the amazon response contains the advertiser's information like Name, customerId, Primary_email which we then saved into our own database. The /profiles endpoint in Advertising API contains only the profileId of the first advertiser we previously onboarded. We are expecting tru profile's in /profiles API since we already onboarderd twi advertisers. My question is, why we can't get the profileID for the second advertiser we onboarded? It seems that the authorization through LWA was successful but it doesn't authorized our app to have access to the new advertiser's data because the profileID was not available in /profiles endpoint.

According to the support engineer, it is not possible to have multiple advertisers to authorize our app tru LWA.

Has anyone encountered this issue?

Regards