Query Regarding Workfront APIs Authentication

Hi all,

We have a specific use case where we want to leverage Workfront-related APIs, such as "attask/api/v15.0/user/search" and "attask/api/v15.0/user?id={user_id}." To set up this functionality, we followed the guidance provided in this link [https://experienceleague.adobe.com/docs/workfront/using/adobe-workfront-api/workfront-api.html] . 

The process involved several steps. First, we created an Integration App for OAuth from our console and generated a pair of public and private keys for asymmetric encryption. Subsequently, we used the Customer ID and User ID from the app to create a JWT token, which was then signed with the private key. Once we had the JWT token, we made use of this API endpoint: https://yourdomain.my.workfront.com/integrations/oauth2/api/v1/jwt/exchange to obtain an access token, which we successfully acquired.

However, when we attempted to access the aforementioned APIs using the obtained access token and included it as a Bearer token in the authorization header, we encountered authentication issues. The error message we received was:
{
    "error": {
        "class": "com.attask.common.AuthenticationException",
        "message": "Authentication Exception: Authentication Exception: {0}"
    }
}

I would greatly appreciate any assistance in resolving this matter. Please guide me on how to correctly use the access token for authentication and API access. If I have overlooked something or made an error, your guidance would be invaluable.


Thanks.