SQLAlchemy Aliase not instantiating constructor value

Question

Recently we have migrated to newer latest version of SQLAlchemy. Below code was working without any issue in old version.

My class:

from redshift.classpath import HomePod

class User(HomePod):
__tablename__ = 'user'

customeraccountid = Column(BIGINT, primary_key=True)
tenantid = Column(BIGINT, primary_key=True)
userid = Column(String(128), primary_key=True)
acceptsmarketing = Column(Boolean)
createby = Column(String(128))
createdate = Column(TIMESTAMP)


__table_args__ = {}

def __init__(self, schema=HomePod): 
      self.__table__.schema = schema

I was using below code:

User_1 = aliased(User(schema='Myschemaname'))

But now, the schema name which I am passing not getting assigned to the class. I have tried below code as well. But no luck.

User_1 = aliased(User)
User_1.schema = 'myschemaname'

Someone please suggest what to do in this situation?

Thanks