Update definition for user's full name

    public int id;

    /**

     * A user's full name is: first_name || ' ' || last_name, if both first name and last name are alphabetical, otherwise first_name || last_name.

     * A user's full name is: first_name || ' ' || last_name, if both first name and last name are alphabetical (English alphabets) or space (' '), otherwise first_name || last_name.

     *

     * For example, if a user has first name David and last name Lee then the full name is David Lee; if another user has first name 张 and last name 三, the full name is 张三.

     * For example, if a user has first name David and last name Lee then the full name is David Lee; if another user has first name 张 and last name 三, the full name is 张三;

     * if first name 'David Lee' and last name 'Roth' then full name is 'David Lee Roth'.

     */

    public String fullName;

}