How to handle oauth_verifier manually ('oob' callback URL)

[zisoft]

I'm developing a plugin for a MacOS application which will use the Flickr API.
Because this is only a plugin I cannot provide an own URL scheme for the callback so according to the OAuth1 spec I set 'oob' (out-of-band) for the callback URL.

So I implemented the following steps:

oauthswift = OAuth1Swift(
    consumerKey:    "********",
    consumerSecret: "********",
    requestTokenUrl: "https://www.flickr.com/services/oauth/request_token",
    authorizeUrl:    "https://www.flickr.com/services/oauth/authorize",
    accessTokenUrl:  "https://www.flickr.com/services/oauth/access_token"
)

// authorize
let handle = oauthswift.authorize(
    withCallbackURL: "oob") { result in
    switch result {
    case .success(let (credential, response, parameters)):
      print(credential.oauthToken)
      print(credential.oauthTokenSecret)
      print(parameters["user_id"])
      // Do your request
    case .failure(let error):
      print(error.localizedDescription)
    }             
}

This works as expected, the Flickr authorize page is opened in the browser and after approving permissions I get the verifier code displayed on that page. With this verifier I now need to call the accessTokenUrl.

I cannot figure out how to manually set the oauth_verifier in client.credentials because it is readonly.

EDIT:
I have declared open the OAuthSwiftCredential.oauthVerifier property as well as the OAuth1Swift.postOAuthAccessTokenWithRequestToken method. Now I can manually set the oauth_verifier value after authorize and then call the accessTokenUrl. But I'm curious to know if I'm the only one who uses this workflow?

[sk-chanch]

let header = oauthswift?.client.credential.makeHeaders("https://xxxx.com/access_token",
                                                               method: .POST,
                                                               parameters: `["oauth_verifier":"*************"])`
        
        
        
        oauthswift?.client.post("https://xxxx.com/access_token",
                                headers: header)
        {[weak self] result in
            switch result {
            case .success(let response):
                print(response)
            case .failure(let error):
                print(error)
                
            }
        }