$this->_rulesFactory = new RulesFactory(
new RuleExtensionRegistry(),
$this->_errorTemplateRegistry,
new Compiler()
);
$this->_validator = new Validator($this->_rulesFactory);
$this->_validator->field('email')->required()->email("uniqe");
I used this code and getting this error in the postman
"message": "No rule extension with name \"uniqe\" exists",
You need to mention the table name, from where you want to check the email.
$this->_validator->field('email')->required()->email("uniqe:table_name");