title: Error: "Username value length exceeds 20 characters" when calling Sabre CarAvailability in Postman
body: <p>I am trying to make a POST request to the <a href="https://beta.developer.sabre.com/docs/rest_apis/ground/search/car_availability/reference-documentation" rel="nofollow noreferrer">Sabre CarAvailability API</a> with Postman. When I make the request I get back the following error: <strong>Username value length exceeds 20 characters</strong>.</p>
  
  <ul>
  <li>I obtained a bearer token and added it to the authorization section of my request</li>
  <li>I added the <code>carAvailabilityRequest</code> object as raw data, in the body section of the request.</li>
  <li>I tried changing the values of this object, but so far without luck. I know I am doing something wrong but I have no idea what. </li>
  </ul>
  
  <p>Here is the carAvailabilityRequest object I passed:</p>
  
  <pre><code>{
    "OTA_VehAvailRateRQ": 
    {
      "TimeStamp": "string",
      "Version": "string",
      "ReturnHostCommand": true,
      "VehAvailRQCore": 
      {
        "RPH": 0,
        "QueryType": "Quote", 
        "VehRentalCore": 
        {
          "PickUpDateTime": "03-31T09:00",
          "ReturnDateTime": "04-05T11:00",
          "PickUpLocation": 
          {
            "LocationCode": "DFW",
            "CityLocation": "string"
          },
          "ReturnLocation": 
          {
            "LocationCode": "DFW"
          }
        }
      }
    }
  }
  </code></pre>
  
  <p>The request does not get through and I get the following error message:</p>
  
  <pre><code>{
      "Fault": {
          "faultcode": "{http://schemas.xmlsoap.org/soap/envelope/}Client.EbXmlFieldTooLong",
          "faultstring": "Username value length exceeds 20 characters",
          "detail": {
              "StackTrace": [
                  "com.sabre.universalservices.base.exception.InvalidEbXMLException: errors.xml.USG_EBXML_FIELD_TOO_LONG"
              ]
          }
      },
      "Links": [
          {
              "rel": "self",
              "href": "https://api-crt.cert.havail.sabre.com/v2.4.1/shop/cars"
          },
          {
              "rel": "linkTemplate",
              "href": "https://api-crt.cert.havail.sabre.com/&lt;version&gt;/shop/cars"
          }
      ]
  }
  </code></pre>
  
  <p>Please help me solve this issue - thanks in advance.</p>