def import_identity(self, label: str, encrypted_pri_key: str, pwd: str, salt: str, b58_address: str) -> Identity:
        """
        This interface is used to import identity by providing encrypted private key, password, salt and
        base58 encode address which should be correspond to the encrypted private key provided.

        :param label: a label for identity.
        :param encrypted_pri_key: an encrypted private key in base64 encoding from.
        :param pwd: a password which is used to encrypt and decrypt the private key.
        :param salt: a salt value which will be used in the process of encrypt private key.
        :param b58_address: a base58 encode address which correspond with the encrypted private key provided.
        :return: if succeed, an Identity object will be returned.
        """
        scrypt_n = Scrypt().n
        pri_key = Account.get_gcm_decoded_private_key(encrypted_pri_key, pwd, b58_address, salt, scrypt_n, self.scheme)
        info = self.__create_identity(label, pwd, salt, pri_key)
        for identity in self.wallet_in_mem.identities:
            if identity.ont_id == info.ont_id:
                return identity
        raise SDKException(ErrorCode.other_error('Import identity failed.'))
This interface is used to import identity by providing encrypted private key, password, salt and
        base58 encode address which should be correspond to the encrypted private key provided.

        :param label: a label for identity.
        :param encrypted_pri_key: an encrypted private key in base64 encoding from.
        :param pwd: a password which is used to encrypt and decrypt the private key.
        :param salt: a salt value which will be used in the process of encrypt private key.
        :param b58_address: a base58 encode address which correspond with the encrypted private key provided.
        :return: if succeed, an Identity object will be returned.