canEnter:
bool(true)
<br><br>hasUsername:
bool(true)

hasPassword:
bool(true)

hasAcceptedTerms:
bool(true)
<br>canRegister:
bool(true)
<br><br>empty_string:
string(0) ""

zero:
int(0)

null_value:
NULL

empty_array:
array(0) {
}
<br>empty_string: Falsy
zero: Falsy
null_value: Falsy
empty_array: Falsy<br>space_string: Truthy