[Question] how to encrypt using aws kms in sqlalchemy

[KIWONY]

hello,
I am trying to implement encryption using SQLAlchemy when storing data in PostgreSQL. I referred to the code for StringEncryptedType in the documentation of sqlalchemy-utils, which I have attached via the link.

https://sqlalchemy-utils.readthedocs.io/en/latest/data_types.html#sqlalchemy_utils.types.encrypted.encrypted_type.StringEncryptedType

class Test(Base):
    __tablename__ = "test"

    id = Column(Integer, primary_key=True)
    name = Column(StringEncryptedType(String, key_id, AesEngine, 'pkcs5'))

But I would like to use AWS KMS here and when I set the ARN of AWS KMS as the secret key, the data is not encrypted.
What am I missing?