OauthButton: How do I set access_type = offline?

[kakizaki]

I would like to develop an application to display the contents of Gmail inbox.
However, refresh_token does not exist even after checking onAccessToken.

I would like to set access_type = offline to get refresh_token,
What should I do?

<Oauth
  settingsKey="oauth"
  title="Gmail Login"
  label="Gmail"
  status="Login"
  authorizeUrl="https://accounts.google.com/o/oauth2/v2/auth"
  requestTokenUrl="https://www.googleapis.com/oauth2/v4/token"
  clientId="XXXXXXXXXXXXXXXXXX"
  clientSecret="XXXXXXXXXXXXX"
  scope="https://www.googleapis.com/auth/gmail.readonly"
  onAccessToken={async (data) => {
    console.log(data);
  }}
/>

[allyann]

I would like an answer to this question too. Even with pkce set to true it does not return a refresh token.

[cristallo]

You can try adding "offline_access" to the scope.

scope="offline_access, https://www.googleapis.com/auth/gmail.readonly

NOTE:

I am currently experimenting some issues on authentication using iOS (on Android is working fine)
3rd-party-REST-API-OAuth-authentication

[allyann]

That didn't work for me, it returns with an error "invalid scope"