fix(tarp): reference access token not displayed

**Describe the bug**
When the access token type is configured as Reference instead of JWT, the application fails to display the access token. Instead, it shows an error indicating that the token is not in a valid JWT format.

**To Reproduce**
Steps to reproduce the behavior:
1. In the Jans Server, update the TARP client configuration: Change the Access Token Type from JWT to Reference.
2. Save the configuration changes.
3. Log in with the TARP using valid credentials.
4. Observe the displayed result.

**Actual Result**