How to use the pymongocrypt.binding.lib.mongocrypt_setopt_kms_provider_aws function in pymongocrypt

def __init(self):
        """Internal init helper."""
        kms_providers = self.__opts.kms_providers
        if 'aws' in kms_providers:
            access_key_id = str_to_bytes(kms_providers['aws']['accessKeyId'])
            secret_access_key = str_to_bytes(
                kms_providers['aws']['secretAccessKey'])
            if not lib.mongocrypt_setopt_kms_provider_aws(
                    self.__crypt,
                    access_key_id, len(access_key_id),
                    secret_access_key, len(secret_access_key)):
                self.__raise_from_status()
        if 'local' in kms_providers:
            key = kms_providers['local']['key']
            with MongoCryptBinaryIn(key) as binary_key:
                if not lib.mongocrypt_setopt_kms_provider_local(
                        self.__crypt, binary_key.bin):
                    self.__raise_from_status()

        schema_map = self.__opts.schema_map
        if schema_map is not None:
            with MongoCryptBinaryIn(schema_map) as binary_schema_map:
                if not lib.mongocrypt_setopt_schema_map(
                        self.__crypt, binary_schema_map.bin):