"401 - Unauthorized: Access is denied due to invalid credentials." while calling service from third parties

Hello community,

I have developed a service in Creatio that will be called from third parties. The service is called successfully in postman but programmatically it doesn't work. The authentication works fine and returns status code 200 and the BPMCSRF cookie. When the third party tries to call the service it gives the following message "401 - Unauthorized: Access is denied due to invalid credentials."  How can we investigate this issue? Does Creatio offer a logging option so we can investigate the request and response or is there something else that we have forgotten during the implementation of this service?