* Records any errors in the form's BindingResult context for display to the person.
* An optional SignupCallback may be specified for performing custom processing after successful member signup.
*/
public boolean signup(SignupForm form, BindingResult formBinding, SignupCallback callback) {
try {
Account account = createAccount(form.createPerson(),callback);
gateway.signedUp(account);
AccountUtils.signin(account);
if (callback != null) {
callback.postSignup(account);
}