Start by creating a python runtime environment.
python3 -m venv venvsource venv/bin/activatepip install --upgrade pip; pip3 install -r requirements.txtcp env.sample .envBe sure to edit values to match your environment.
flask runcurl -X GET 'http://127.0.0.1:5000/v1/3ds_challenge/12345'{"error":"Transaction not found"}deactivate