class InvalidConfig(Exception):
    def __init__(self, *args, **kwargs):
        super(InvalidConfig, self).__init__(*args, **kwargs)

class SulleyError(Exception):
    def __init__(self, *args, **kwargs):
        super(SulleyError, self).__init__(*args, **kwargs)

class ProviderError(Exception):
    def __init__(self, *args, **kwargs):
        super(ProviderError, self).__init__(*args, **kwargs)

class InvalidConfig(Exception):
    def __init__(self, *args, **kwargs):
        super(InvalidConfig, self).__init__(*args, **kwargs)

class SulleyError(Exception):
    def __init__(self, *args, **kwargs):
        super(SulleyError, self).__init__(*args, **kwargs)

class ProviderError(Exception):
    def __init__(self, *args, **kwargs):
        super(ProviderError, self).__init__(*args, **kwargs)

class BadRequest(Exception):
    def __init__(self, *args, **kwargs):
        super(BadRequest, self).__init__(*args, **kwargs)

use internal werkzeug internal exceptions