public function login( $username, $password ) {
		$I = $this->_actor;

		$I->amOnPage( wp_login_url() );
		$I->fillField( self::USERNAME_FIELD, $username );
		$I->fillField( self::PASSWORD_FIELD, $password );
		$I->click( self::LOGIN_BUTTON );
		$I->seeCookie( LOGGED_IN_COOKIE );
		
		return $this;
	}