withdraw_user_signup_button
Renders a "Withdraw" button for an existing signup. The button text and the button CSS classes can be customized.
Examples
Basic
{% withdraw_user_signup_button signup %}
Customizing the button text
{% withdraw_user_signup_button signup "Withdraw my signup" %}
Customizing the button text and the CSS class
{% withdraw_user_signup_button signup "Withdraw my signup" btn-warning %}