/**
  * Allow clients to test authentication.
  * @return mixed response from the API call*/
 public function getAuthentications()
 {
     //the base uri for api requests
     $queryBuilder = Configuration::$BASEURI;
     //prepare query string for API call
     $queryBuilder = $queryBuilder . '/authentications';
     //validate and preprocess url
     $queryUrl = APIHelper::cleanUrl($queryBuilder);
     //prepare headers
     $headers = array('user-agent' => 'APIMATIC 2.0', 'Accept' => 'application/json', 'X-API-TOKEN' => $this->xAPITOKEN);
     //prepare API request
     $request = Unirest::get($queryUrl, $headers);
     //and invoke the API call request to fetch the response
     $response = Unirest::getResponse($request);
     //Error handling using HTTP status codes
     if ($response->code == 403) {
         throw new APIException('User not authorized to perform the operation', 403);
     } else {
         if ($response->code < 200 || $response->code > 206) {
             //[200,206] = HTTP OK
             throw new APIException("HTTP Response Not OK", $response->code);
         }
     }
     return $response->body;
 }
 /**
  * Update an account.
  * @param  AccountModel     $account            Required parameter: TODO: type description here
  * @param  int              $accountNumber      Required parameter: The account number
  * @return string response from the API call*/
 public function update($account, $accountNumber)
 {
     //the base uri for api requests
     $queryBuilder = Configuration::$BASEURI;
     //prepare query string for API call
     $queryBuilder = $queryBuilder . '/accounts/{account_number}';
     //process optional query parameters
     APIHelper::appendUrlWithTemplateParameters($queryBuilder, array('account_number' => $accountNumber));
     //validate and preprocess url
     $queryUrl = APIHelper::cleanUrl($queryBuilder);
     //prepare headers
     $headers = array('user-agent' => 'APIMATIC 2.0', 'content-type' => 'application/json; charset=utf-8', 'X-API-TOKEN' => $this->xAPITOKEN);
     //prepare API request
     $request = Unirest::put($queryUrl, $headers, json_encode($account));
     //and invoke the API call request to fetch the response
     $response = Unirest::getResponse($request);
     //Error handling using HTTP status codes
     if ($response->code == 403) {
         throw new APIException('User not authorized to perform the operation', 403);
     } else {
         if ($response->code == 400) {
             throw new APIException('Request could not be understood', 400);
         } else {
             if ($response->code == 404) {
                 throw new APIException('Resource not found', 404);
             } else {
                 if ($response->code < 200 || $response->code > 206) {
                     //[200,206] = HTTP OK
                     throw new APIException("HTTP Response Not OK", $response->code);
                 }
             }
         }
     }
     return $response->body;
 }