MeteorJS: extraSignupFields, default value for checkbox

i want to know if there’s a way to set a default value for checkbox in extraSignupFields ?

I want a invisible checkbox with false default to know if an user is active or not. (and save on mongo)


extraSignupFields: [
fieldName: “active”,
fieldLabel: "active?"
inputType: ‘checkbox’,
visible: false

fieldName: “sobrenome”,
fieldLabel: “Sobrenome”
requestPermissions: {
facebook: [“email”,“user_about_me”]