In R POST request OpenAI API Error in curl::curl_fetch_memory()

This is my code:
A simple POST() request to OpenAI API:

In R POST request OpenAI API Error in curl::curl_fetch_memory()

This is my code:
A simple POST() request to OpenAI API:

In R POST request OpenAI API Error in curl::curl_fetch_memory()

This is my code:
A simple POST() request to OpenAI API:

In R POST request OpenAI API Error in curl::curl_fetch_memory()

This is my code:
A simple POST() request to OpenAI API: