I looked the serialized array data in the database for what is there when the plugin is activated upon a fresh install and modelled the reset_settings() method off of that data and the includes/Classifai/Providers/Watson/NLU.php reset_settings() method.

Not sure if there is more that you are looking for or if you would also like a button on this page that triggers an event to reset the settings. If there is something like that you are looking for please let me know :)

Created a get_default_settings() method that returns the default settings, then used that function in reset_settings() method and setup_fields_sections() method

…s_field() arguments