add login check for first request execution

tests/api/test_requests.py

@@ -8,9 +8,8 @@ from delta_barth.api import requests as requests_
 
 @pytest.mark.api_con_required
 def test_get_sales_prognosis_data_Success(session):
-    resp, status = session.login()
+    # do not login: let routine do it
     # test without company ID
-    assert status.code == 0
     date = Datetime(2023, 12, 15)
     resp, status = requests_.get_sales_prognosis_data(session, None, date)
     assert status.code == 0