/**
* authenticate() - defined by AdapterInterface.
* Attempt an authentication.
* Previous to this call, this adapter would have already been configured
* with all necessary information to successfully connect to a database table
* and attempt to find a record matching the provided identity.
*
*
* @access public
* @throws RuntimeException if answering the authentication query is impossible
* @return Result
*/
public function authenticate()
{
$this->authenticateSetup();
$entities = $this->_query->findBy('Users\\Entity\\User', array('username' => $this->_identity));
return $this->validateResult($entities);
}
