CURLOPT_XOAUTH2_BEARER (3) - Linux Manuals
CURLOPT_XOAUTH2_BEARER: specify OAuth 2.0 access token
NAME
CURLOPT_XOAUTH2_BEARER - specify OAuth 2.0 access tokenSYNOPSIS
#include <curl/curl.h>CURLcode curl_easy_setopt(CURL *handle, CURLOPT_XOAUTH2_BEARER, char *token);
DESCRIPTION
Pass a char * as parameter, which should point to the zero terminated OAuth 2.0 Bearer Access Token for use with IMAP, POP3 and SMTP servers that support the OAuth 2.0 Authorization Framework.Note: The user name used to generate the Bearer Token should be supplied via the CURLOPT_USERNAME(3) option.