def __init__(self, dir, uri, auth_user, auth_password, base_dn, group=None):
        self.file_key_provider = key_provider.FileKeyProvider(dir)
        self.ldap_key_provider = LDAPKeyProvider(uri, auth_user, auth_password,
                                                 base_dn, group)
Constructs a FileKeyProvider based on the directory dir, and a
dataset/ETHPy150Open spotify/crtauth/crtauth/ldap_key_provider.py/HybridKeyProvider.__init__