{default_text_template, <<"The account \"{{account.name}}\" has less than {{threshold}} of credit remaining.\n We are toping up the account for {{amount}}.">>}.
{default_html_template, <<"
The account \"{{account.name}}\" has less than {{threshold}} of credit remaining.
We are toping up the account for {{amount}}.
">>}.
{default_subject_template, <<"Account {{account.name}} has been top up">>}.