How to declare a table class that contains multi-column primary key?

In case columns are declared in the same order as they should be in the primary key:

class User(Base):
    field1 = Column(Integer, primary_key=True)
    field2 = Column(Integer, primary_key=True)

Otherwise declare it in __table_args__:

class User(Base):
    field1 = Column(Integer)
    field2 = Column(Integer)
    __table_args__ = (
        PrimaryKeyConstraint(field2, field1),
        {},
    )