Postgres : (1) Insert not working (2) Schema.create not working

[Somnium99]

I created a database on my local machine, and for some reason two strange things happen when I'm using SQLDelight :

1. Running MyDb.Schema.create(dataSource.asJdbcDriver()) doesn't create the table "users".

2. because of 1, I manually created the users table (through some postgres client).
   But then :
   "getUsers" (SELECT query) --> does work.
   "addUser" (INSERT query) --> doesn't work.

kotlin/repository/postgres/sql/Users.sq :

CREATE TABLE users (
    id         SERIAL8 PRIMARY KEY,
    name       VARCHAR   NOT NULL,
    last_name  VARCHAR
);

addUser:
INSERT INTO users(name, last_name) VALUES (?, ?);

getUsers:
SELECT * FROM users;

Gradle file :

sqldelight {
    database("MyDb") {
        packageName = "repository.postgres.sql" 
        sourceFolders = listOf("kotlin")
        dialect = "postgresql"
    }
}

Main.kt :

 
 val db = MyDb(dataSource.asJdbcDriver())

 MyDb.Schema.create(dataSource.asJdbcDriver()) ----> doesn't work (doesn't create a table "users")

Am I missing something or is that a bug of some sort?