Retrieve user from existing table User - php

Question

I'm really new to Symfony and I'm learning how it works.
So I have a DB and a table on it called USER with the fields name,username,password etc etc.
I'm trying to create a login form that will take the user from that table.
I've already created my enity User
I've read the doc here, but it's not what I want, because as i said my entity it's still there.
Should I use FOS user bunble? I've read the doc here of this bundle, but I didn't get the final part (step7).So my question is, can I use my User Entity with FOS user Bundle? If the answer is no, there is another solution to that, sicne I don't what to change my DB table?
Thank everyone in advance
P.s I generated the User entity following this dochere and this is the resulting class
namespace LocalWorker\BackendBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
/**
* Utente
*/
class Utente
{
/**
* #var string
*/
private $uNome;
/**
* #var string
*/
private $uCognome;
/**
* #var string
*/
private $uUsername;
/**
* #var string
*/
private $uPassword;
/**
* #var string
*/
private $uEmail;
/**
* #var string
*/
private $uRuolo;
/**
* #var integer
*/
private $uStatus;
/**
* #var \DateTime
*/
private $uDateIns;
/**
* #var \DateTime
*/
private $uDateActive;
/**
* #var integer
*/
private $uId;
/**
* Set uNome
*
* #param string $uNome
* #return Utente
*/
public function setUNome($uNome)
{
$this->uNome = $uNome;
return $this;
}
/**
* Get uNome
*
* #return string
*/
public function getUNome()
{
return $this->uNome;
}
/**
* Set uCognome
*
* #param string $uCognome
* #return Utente
*/
public function setUCognome($uCognome)
{
$this->uCognome = $uCognome;
return $this;
}
/**
* Get uCognome
*
* #return string
*/
public function getUCognome()
{
return $this->uCognome;
}
/**
* Set uUsername
*
* #param string $uUsername
* #return Utente
*/
public function setUUsername($uUsername)
{
$this->uUsername = $uUsername;
return $this;
}
/**
* Get uUsername
*
* #return string
*/
public function getUUsername()
{
return $this->uUsername;
}
/**
* Set uPassword
*
* #param string $uPassword
* #return Utente
*/
public function setUPassword($uPassword)
{
$this->uPassword = $uPassword;
return $this;
}
/**
* Get uPassword
*
* #return string
*/
public function getUPassword()
{
return $this->uPassword;
}
/**
* Set uEmail
*
* #param string $uEmail
* #return Utente
*/
public function setUEmail($uEmail)
{
$this->uEmail = $uEmail;
return $this;
}
/**
* Get uEmail
*
* #return string
*/
public function getUEmail()
{
return $this->uEmail;
}
/**
* Set uRuolo
*
* #param string $uRuolo
* #return Utente
*/
public function setURuolo($uRuolo)
{
$this->uRuolo = $uRuolo;
return $this;
}
/**
* Get uRuolo
*
* #return string
*/
public function getURuolo()
{
return $this->uRuolo;
}
/**
* Set uStatus
*
* #param integer $uStatus
* #return Utente
*/
public function setUStatus($uStatus)
{
$this->uStatus = $uStatus;
return $this;
}
/**
* Get uStatus
*
* #return integer
*/
public function getUStatus()
{
return $this->uStatus;
}
/**
* Set uDateIns
*
* #param \DateTime $uDateIns
* #return Utente
*/
public function setUDateIns($uDateIns)
{
$this->uDateIns = $uDateIns;
return $this;
}
/**
* Get uDateIns
*
* #return \DateTime
*/
public function getUDateIns()
{
return $this->uDateIns;
}
/**
* Set uDateActive
*
* #param \DateTime $uDateActive
* #return Utente
*/
public function setUDateActive($uDateActive)
{
$this->uDateActive = $uDateActive;
return $this;
}
/**
* Get uDateActive
*
* #return \DateTime
*/
public function getUDateActive()
{
return $this->uDateActive;
}
/**
* Get uId
*
* #return integer
*/
public function getUId()
{
return $this->uId;
}
}