redirect issue in my function

Hi all,

I am trying to get the else part of this function to work.

PHP Code:

public function login_user_process(){
            
    $data = array(
        'username' => $this->input->post('username'),
        'password' => $this->input->post('password')
    );

    $this->db->select('*');
    $this->db->from('account_user');
    $this->db->where('username', $data['username']);
    $query = $this->db->get();

    foreach ($query->result() as $row){
    
        $result = $row->password;

        if (password_verify($data['password'], $result)) {
            $user_data = array (
                'username' => $data['username'],
                'logged_in' => true
            );  

        $this->session->set_userdata($user_data);
        redirect('admin/dashboard');  

        } else {

        echo "error";
        redirect('admin/login');
        }

    }
} 


At the moment if I login correctly it works and lets me in, but if I get it wrong I just get a blank screen and it stays in the function instead of redirecting back to admin/login.

Can anyone help please?

Thanks,
Doomie