If you don't know about PyAutoGui Python library - https://pyautogui.readthedocs.io/en/latest/ This script automates brute forcing a text field through the gui for sites that do not have an invalid credentials timeout response.
$ pip install PyAutoGUI
$ git clone https://github.com/cann66dev/BruteForceAttack.git
$ cd BruteForceAttack/BruteForce
$ python BruteForceAttack.py --help
$ python BruteForceAttack.py --file "file name or file directory"