Sets the {@code SessionIdGenerator} used by the {@link #generateSessionId(hunt.shiro.session.Session)}
method. Unless overridden by this method, the default instance ss a {@link JavaUuidSessionIdGenerator}.
@param sessionIdGenerator the {@code SessionIdGenerator} to use in the
{@link #generateSessionId(hunt.shiro.session.Session)} method.
Sets the {@code SessionIdGenerator} used by the {@link #generateSessionId(hunt.shiro.session.Session)} method. Unless overridden by this method, the default instance ss a {@link JavaUuidSessionIdGenerator}.
@param sessionIdGenerator the {@code SessionIdGenerator} to use in the {@link #generateSessionId(hunt.shiro.session.Session)} method.