error: oauth_verifier in Access-Control-Allow-Headers

I keep getting this error. Would you have any suggestions for me please?
—-
Request header field oauth_verifier is not allowed by Access-Control-Allow-Headers in preflight response.

Here is my code:
var settings = {
“async”: true,
“crossDomain”: true,
“url”: “http://north.pl/wp-json/wp/v2/posts?title=ttttt&content=cccc”,
“method”: “POST”,
“headers”: {
“oauth_verifier”: “xxxxxxxxxxxxxxxxxxxx”,
“authorization”: “OAuth oauth_consumer_key=’xxxxxxxxxxx’,oauth_token=’xxxxxxxxxxx’,oauth_signature_method=’HMAC-SHA1′,oauth_timestamp=’1497028062′,oauth_nonce=’xxxxxxxxxxx’,oauth_version=’1.0′,oauth_signature=’xxxxxxxxxxx'”,
“content-type”: “application/x-www-form-urlencoded”
}
}
jQuery.ajax(settings).done(function (response) {
console.log(response);
});