I want to create a user for postgresql using python psycopg2.sql module

This is the code.

def create_user(self, id: str, password: str):
    query=SQL(
        "CREATE USER {id} WITH PASSWORD {password}".format(
            id=id
            password=password
        )
    )
    try:
        self.cur.execute(
            query=query
        )
    except DuplicateObject:
        print("{id} User already created.".format(id=id))
    else:
        print("{id} User create.".format(id=id))

in the code below

query=SQL(
    "CREATE USER {id} WITH PASSWORD {password}".format(
        id=id
        password=password
    )
)

I am trying to use the class of the sql module for the id and password variables of the query.

id=Identifier(id)
password=SQL(password)  

like the code above.

Using identifiers and SQL will result in a syntax error.
Which class fits the id password variable?