validate static method
Implementation
static Either<EmailFailure, String> validate(String input) {
const emailRegex =
r"""^[a-zA-Z0-9.a-zA-Z0-9.!#$%&'*+-/=?^_`{|}~]+@[a-zA-Z0-9]+\.[a-zA-Z]+""";
if (RegExp(emailRegex).hasMatch(input)) {
return right(input);
} else {
return left(EmailFailure(input));
}
}