Unknown option: "-3" Unix manual page for CURLOPT_XOAUTH2_BEARER. (host=minya system=Darwin)
CURLOPT_XOAUTH2_BEARER(3)  curl_easy_setopt options  CURLOPT_XOAUTH2_BEARER(3)

NAME
       CURLOPT_XOAUTH2_BEARER - specify OAuth 2.0 access token

SYNOPSIS
       #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  sup-
       plied via the CURLOPT_USERNAME(3) option.

       The  application  does not have to keep the string around after setting
       this option.

DEFAULT
       NULL

PROTOCOLS
       IMAP, POP3 and SMTP

EXAMPLE
       TODO

AVAILABILITY
       Added in 7.33.0

RETURN VALUE
       Returns CURLE_OK if the option is  supported,  CURLE_UNKNOWN_OPTION  if
       not, or CURLE_OUT_OF_MEMORY if there was insufficient heap space.

SEE ALSO
       CURLOPT_MAIL_AUTH(3), CURLOPT_USERNAME(3),

libcurl 7.54.0                 December 21, 2016     CURLOPT_XOAUTH2_BEARER(3)