Resfresh Token using c# code for Oauth2.0

Question

Hi,
I need assisstance in Oauth2.0 usage.
After I generated token I have following properties

The moment that I do not understand is how to refresh token. Here I got ExpiredAt property that shows that this token will be expired.
Assuming that it is already expired, how I must refresh it ?
&nbsp;
I checked provided samples of code

Will be correct if I make such verification for expiration of token

and if it expried I add this code ?
var client = new DropboxClient(Settings.Default.AccessToken, Settings.Default.RefreshToken, ApiKey, ApiSecret, config);await client.RefreshAccessToken(newScopes);var clientNew = new DropboxClient(Settings.Default.AccessToken, Settings.Default.RefreshToken, ApiKey, ApiSecret, config);
&nbsp;
Thanks in advance

Здравко · Answer

Hi Ivan_,You don't have to perform any of the actions shown. Whenever such action has shown in some example, it's just to show how the refresh works (not that you have to use it)! Once you initialize/construct a client object using the credentials provided, the object itself will take care to refresh whenever needed. 😉 You don't need to do anything explicitly by yourself (other than just properly construct client object, together with the refresh token, and use it).Hope this clarifies matter.

Здравко · Answer

Ivan_&nbsp;wrote:...Currently I transfer only access token and it works🤓 Really?! If it works, what actually you are asking for?! 🧐😁You cannot expect when object is initialized with just access token it be able refresh somehow. 🤷 How such thing can happen? Impossible of course - the refresh token is required, at least! Even more, once refresh token is provided, the access token and expiration date become optional. Take a look here for instance.&nbsp;😉 Depending on how exactly you have performed authentication flow (PKCE or not), you may need to add the application secret too.Hope this helps.

Ivan_ · Answer

Hi Здравко&nbsp;Thank you for the quick responseCan you suggest how properly construct client object with refresh token ?Currently I transfer only access token and it works&nbsp;

Ivan_ · Answer

ThanksSo, basically I need to this, am I right ?var config = new DropboxClientConfig("SimplePKCEOAuthApp") { HttpClient = httpClient};var client = new DropboxClient(Settings.Default.RefreshToken, ApiKey, config);&nbsp;I have performed authentication flow&nbsp; without PKCE.I need to clarify 2 moments :1) What is that parameter for config object : "SimplePKCEOAuthApp"?Is that application console name ?&nbsp;2)Is it enough to transfer only refresh token ? It looks strange, because we do not use access token with such approachThat is the way how I get access tokenIt is same way how I described it in that topic https://www.dropboxforum.com/t5/Dropbox-API-Support-Feedback/How-to-programmatically-get-the-Authorization-code-without/td-p/626621 with which you helped me

Здравко · Answer

Ivan_&nbsp;wrote:...var client = new DropboxClient(Settings.Default.RefreshToken, ApiKey, config);&nbsp;I have performed authentication flow&nbsp; without PKCE....Nope, skipping application secret is only possible while PKCE is in use.&nbsp;Ivan_&nbsp;wrote:...1) What is that parameter for config object : "SimplePKCEOAuthApp"?Is that application console name ?...No, it's just a free name (even non mandatory - i.e. you can skip it) describing somehow your application. You can put there "ARTY1", for instance, it normally match the application name. Follow this rule.&nbsp;Ivan_&nbsp;wrote:...2)Is it enough to transfer only refresh token ? It looks strange, because we do not use access token with such approach...You are mixing different things! In previous discussion the topic was the code, not the token! (take care, in your code you are still mixing the names - might be that's why you got in confusion) Access token is enough by self&nbsp; to authenticate regular API call (or equivalent using any SDK), refrsh token on other side needs additional confirmations (least application' key, but in your case application' secret too) to be validated the usage.

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