Passing func type argument to Model.create does not work as expect  #736

• GINO version: 1.0.1
• Python version: 3.8
• asyncpg version: 0.21
• PostgreSQL version: 12.4

Description

Model.create() does not seem to work with sqlalchemy.func object.

What I Did

Currently I make use of crypt() and gen_salt() from pgcrypto extension to generate password hash.
What I want to do is to create a user record as follow:

new_user = await User.create(email="example@example.com", password=func.crypt(pass_val, func.gen_salt('bf', 7)), **data)

Is my understanding of Model.create usage wrong or it's a bug, or a feature doesn't support yet?