fixup! Enable import from bank account if TAN is required after login

web/blueprints/finance/__init__.py

@@ -9,6 +9,7 @@
 
     :copyright: (c) 2012 by AG DSN.
 """
+import logging
 import typing as t
 from base64 import b64encode, b64decode
 from decimal import Decimal
@@ -147,6 +148,7 @@
 bp = Blueprint('finance', __name__)
 access = BlueprintAccess(bp, required_properties=['finance_show'])
 nav = BlueprintNavigation(bp, "Finanzen", icon='fa-euro-sign', blueprint_access=access)
+logger = logging.getLogger(__name__)
 
 
 @bp.route('/')
@@ -269,11 +271,16 @@ def bank_accounts_login(bank_account_id: int, action: str) -> ResponseReturnValu
         mechanisms = client.get_tan_mechanisms()
 
     if "913" in mechanisms:
-        client.set_tan_mechanism("913")  # QR-Code
-    elif "910" in mechanisms:
-        client.set_tan_mechanism("910")  # Manual
+        client.set_tan_mechanism("913")  # chipTAN-QR
     else:
-        raise ValueError("We don't like any of the mechanisms.")
+        logger.error("FinTS: No suitable TAN mechanism available.", exc_info=True)
+        flash(
+            f"TAN-Verfahren „chipTAN-QR“ wird benötigt, jedoch sind am FinTS-Endpunkt nur folgende Verfahren verfügbar: {', '.join(m.name for m in mechanisms.values())}.",
+            "error",
+        )
+        return redirect(
+            url_for(".bank_accounts_login", bank_account_id=bank_account_id, action=action)
+        )
 
     with client:
         if client.init_tan_response: