If equal to 'flash' (default) and the form is accepted it will flash the above message_onsuccess.
If equal to 'flash' (default) and the form fails validation, it will flash the above message_onfailure.
indicates where to redirect the user after the form is accepted.
SQLFORM(tablename).process(next=URL('account', 'index', args='t_account') + '/[id]')