[ 'rules' => 'required|valid_email|is_unique[users.email]', 'errors' => [ 'required' => 'Email is required.', 'valid_email' => 'Please provide a valid email address.', 'is_unique' => 'This email is already registered.', ], ], 'name' => [ 'rules' => 'required|max_length[255]', 'errors' => [ 'required' => 'Name is required.', 'max_length' => 'Name must not exceed 255 characters.', ], ], ]; }