fixup! (backend) wip introduce a token exchange endpoint

src/backend/core/tests/test_api_users_exchange_access_token.py

@@ -92,7 +92,6 @@ def test_exchange_access_token_success(client, settings):
     assert response.data["scope"] == "user:access"
 
     payload = decode_user_access_token(response.data["access_token"], settings)
-    assert payload["token_type"] == "user_access"
     assert payload["user_id"] == str(user.id)
     assert payload["client_id"] == "my-app"
     assert payload["exp"] - payload["iat"] == settings.USER_ACCESS_TOKEN_TTL