LOGIN CONTROLLER
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public function login()

	{

			if(isset($_POST['login_btn'])){

				$username = $_POST['userid'];
				$password = $_POST['psw'];
				$this->load->model('user_model');
				$fetch = $this->user_model->login_user($username, $password);

				if($fetch){

					$this->welcome();
				}else{
					$this->load->view('login');
				}

			}else
				$this->load->view('login');


			/*
			*/
	}

------------------------------------------
LOGIN MODEL
-----------------------------------------
public function login_user($username, $password){

		$user = $username;
		$this->db->select('user_id, password, username');
		$this->db->from('user');
		$this->db->where('username', $username);
		$query = $this->db->get();

		$res = $query->row_array();
		$result = password_verify($password, $res['password']);
	if($query -> num_rows() == 1){
			if(password_verify($password, $res['password'])){
				$_SESSION['userid'] = $res['username'];
				$_SESSION['logged'] = true;
				return 1;
			}
			else{
				$_SESSION['message'] = "Username/Password combination doesn't match.";
				return 0;
			}
		}else{

			$_SESSION['message'] = "Account doesn't exist.";
			return 0;
		}

	}


}