Add OAuth Capability for access_type=offline Parameter in OAuth Config File

[LifeRyuto]

Is your feature request related to a problem? Please describe.
When using Google as the Identity Provider (IdP) in the Tableau Connector Plugin, it is necessary to manually add the access_type=offline parameter to the authUri to receive a refresh token. This is inconvenient and inconsistent with other OAuth capabilities, such as OAUTH_CAP_REQUIRES_PROMPT_CONSENT, which allows parameters to be added via configuration.

Describe the solution you'd like
I propose adding a new OAuth capability, such as OAUTH_CAP_REQUIRES_ACCESS_TYPE_OFFLINE, that can be specified in the OAuth config file. This capability would automatically append access_type=offline to the authUri during authentication with Google.

Example:

<entry>  
  <key>OAUTH_CAP_REQUIRES_ACCESS_TYPE_OFFLINE</key>  
  <value>true</value>  
</entry>  

Describe alternatives you've considered

1. Using the following URL format directly in the authUri:

   https://accounts.google.com/o/oauth2/v2/auth?access_type=offline
   

About You
Name: Ryuto Nakayama
Company: Salesforce/Tableau