Getting Error when Making API Call in Zoho Creator to FreightCom API

Getting Error when Making API Call in Zoho Creator to FreightCom API

I want to make an API connection between my Zoho Creator app and the FreightCom API. Here is the code for my function:

```
string FreightComTest()
{
apiKey = "This is my API KEY. I have hidden it for security reasons.";

// Define your request headers, including the authentication header
headers = {"Content-Type": "application/json", "Authorization": apiKey};

// Define your request body (if needed)
requestBody = {}; // This is where my request body is.

response = invokeurl (endpointUrl, "POST", requestBody, headers, false);
return response;
}
```

Here is a link to the documentation for the freightcom api:

In the API documentation text file that they provided me, this is the authorization schema:

```
"components": {
    "securitySchemes": {
      "ApiKeyAuth": {
        "type": "apiKey",
        "in": "header",
        "name": "Authorization"
      }
    },
```


Here is the error I am getting returned:
```
{
   "responseText":{
      "message":"Authorization header requires 'Credential' parameter. Authorization header requires 'Signature' parameter. Authorization header requires 'SignedHeaders' parameter. Authorization header requires existence of either a 'X-Amz-Date' or a 'Date' header. Authorization=9rJMtYMn1kqmJFimPqeC3JHt4fgEnROC9D83Cm7JTB6W26f93sIB1OgvhaGgemmn"
   },
   "responseHeader":{
      "date":"Sun, 25 Feb 2024 07:32:55 GMT",
      "content-length":"341",
      "x-amz-apigw-id":"Trn-SFpJCYcEIUg=",
      "x-amzn-errortype":"IncompleteSignatureException",
      "x-amzn-requestid":"cb927fcf-bdfe-4fe2-88c8-1d3895d31e7a",
      "content-type":"application/json",
      "connection":"keep-alive"
   },
   "responseCode":403
}
```

When I ran this through ChatGPT, it says that the API expects requests to be signed with AWS Signature Version 4.

I would prefer not to have to do this.

Anyone know a way around this?

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