Scalr_Account_User::getEnvironments PHP Method

    public function getEnvironments($filter = null, $orderByPriority = false)
    {
        $like = '';
        if (isset($filter)) {
            $like = " AND ce.name LIKE '%" . $this->db->escape($filter) . "%'";
        }
        $orderBy = '';
        if ($orderByPriority) {
            $orderBy = " ORDER BY ce.default_priority DESC";
        }
        if ($this->canManageAcl()) {
            return $this->db->getAll("SELECT ce.id, ce.name, ce.default_priority FROM client_environments ce WHERE ce.client_id = ?" . $like . $orderBy, [$this->getAccountId()]);
        } else {
            $teams = array();
            foreach ($this->getTeams() as $team) {
                $teams[] = $team['id'];
            }
            if (count($teams)) {
                return $this->db->getAll("\n                    SELECT ce.id, ce.name, ce.default_priority FROM client_environments ce\n                    JOIN account_team_envs te ON ce.id = te.env_id\n                    WHERE te.team_id IN (" . implode(',', $teams) . ")" . $like . "\n                    GROUP BY ce.id\n                " . $orderBy);
            }
        }
        return [];
    }

 private function AuthenticateREST($request)
 {
     if (!$request['Signature']) {
         throw new Exception("Signature is missing");
     }
     if (!$request['KeyID']) {
         throw new Exception("KeyID is missing");
     }
     if (!$request['Timestamp'] && !$request['TimeStamp']) {
         throw new Exception("Timestamp is missing");
     }
     ksort($request);
     $string_to_sign = "";
     foreach ($request as $k => $v) {
         if (!in_array($k, array("Signature"))) {
             if (is_array($v)) {
                 foreach ($v as $kk => $vv) {
                     $string_to_sign .= "{$k}[{$kk}]{$vv}";
                 }
             } else {
                 $string_to_sign .= "{$k}{$v}";
             }
         }
     }
     $this->debug['stringToSign'] = $string_to_sign;
     $this->user = Scalr_Account_User::init()->loadByApiAccessKey($request['KeyID']);
     if (!$this->user) {
         throw new Exception("API Key #{$request['KeyID']} not found in database");
     }
     $auth_key = $this->user->getSetting(Scalr_Account_User::SETTING_API_SECRET_KEY);
     if ($this->user->getAccountId()) {
         if (!$request['EnvID']) {
             $envs = $this->user->getEnvironments();
             if (!$envs[0]['id']) {
                 throw new Exception("User has no access to any environemnts");
             }
             $this->Environment = Scalr_Environment::init()->loadById($envs[0]['id']);
         } else {
             $this->Environment = Scalr_Environment::init()->loadById($request['EnvID']);
         }
         $this->user->getPermissions()->setEnvironmentId($this->Environment->id)->validate($this->Environment);
         //We must set environment to DI Container.
         $this->getContainer()->environment = $this->Environment;
     }
     $valid_sign = base64_encode(hash_hmac(self::HASH_ALGO, trim($string_to_sign), $auth_key, 1));
     if ($valid_sign != $request['Signature']) {
         throw new Exception("Signature doesn't match");
     }
 }