Add two flags --up-sql and --down-sql to the hasura migrate create command. The contents of this flag should be used to fill in the up.sql and down.sql files of the created migration.

When either one of them is not provided show a warning.

Eg:

hasura migrate create <migration_name> --up-sql "CREATE TABLE article(id serial NOT NULL, title text NOT NULL, content text NOT NULL, rating integer NOT NULL, author_id serial NOT NULL, PRIMARY KEY (id));" --down-sql "DROP TABLE article;"