Function create_user_with_options 

pub async fn create_user_with_options(
    ssh: &mut SshClient,
    username: &str,
    password: &str,
    is_superuser: bool,
    can_create_db: bool,
    can_create_role: bool,
    connection_limit: Option<i32>,
) -> Result<()>

Create a user with full options