code: public CloudStorageProviders getProvider(String accountId, String userId, String serviceId) throws ApiException {
      return getProvider(accountId, userId, serviceId, null);
    }
docs: Gets the specified Cloud Storage Provider configuration for the User.
  Retrieves the list of cloud storage providers enabled for the account and the configuration information for the user.
  @param accountId The external account number (int) or account ID Guid. (required)
  @param userId The user ID of the user being accessed. Generally this is the user ID of the authenticated user, but if the authenticated user is an Admin on the account, this may be another user the Admin user is accessing. (required)
  @param serviceId The ID of the service to access.   Valid values are the service name (\&quot;Box\&quot;) or the numerical serviceId (\&quot;4136\&quot;). (required)
  @return CloudStorageProviders