def METHOD_NAME(self, provider):
    """
    Initialise classes based on the provider
    Args:
        provider (string): Provider name like AWS or Azure etc
    """
    self.validation_class = getattr(importlib.import_module(
        provider.provider_module + '.validate'), 'SystemInstallValidation')
    self.input_class = getattr(importlib.import_module(
        provider.provider_module + '.input'), 'SystemInstallInput')
    self.install_class = getattr(importlib.import_module(
        provider.provider_module + '.install'), 'Install')