<gh_stars>0
class _CredentialError(ValueError):
    pass


class MissingCredentialsError(_CredentialError):
    pass


class InvalidCredentialsError(_CredentialError):
    pass

class _CredentialError(ValueError):
    pass


class MissingCredentialsError(_CredentialError):
    pass


class InvalidCredentialsError(_CredentialError):
    pass