There are a few methods in doing this:

Static method in your model

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class Users_Model extends Model
{
    //

    protected $table = 'inh';

    public static function login_validate()
	{
      return "Hello!";
    }
}

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;

use App\Http\Requests;
use App\Users_Model;
use App\Http\Requests;
use App\Http\Controllers\Controller;

class LoginController extends Controller
{
    public function getLogin() {
      return view('pages.login');
    }

    public function sample(){

    $sample_two =  Users_Model::login_validate();
    echo $sample_two;
    }
}

Resolve the model in the container

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class Users_Model extends Model
{
    //

    protected $table = 'inh';

    public function login_validate()
    {
      return "Hello!";
    }
}

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;

use App\Http\Requests;
use App\Users_Model;
use App\Http\Requests;
use App\Http\Controllers\Controller;

class LoginController extends Controller
{
    public function getLogin() {
      return view('pages.login');
    }

    public function sample(Users_Model $usersModel){

    $sample_two =  $usersModel->login_validate();
    echo $sample_two;
    }
}

I see now. So you need to pass the Name of the Model into the Parameters of my Function? :)

I'll give this a try and give you a fast response. Thank you moinescumihai! :)

its not working ..