qt_refresh_token: Refresh tokens
In colin-fraser/questradeR: An R package for accessing the Questrade API

Submits a refresh token to Questrade to exchange for an access token, which can be used for performing account operations. These tokens are stored securely in your platform's credential store. This will also update the account_set object with the api server.

qt_refresh_token(
  account_set = load_account_set(),
  refresh_token = NULL,
  update_saved_account_set = TRUE
)

`account_set`	account_set object
`refresh_token`	the value of a refresh token. Leave NULL to get this from keyring.
`update_saved_account_set`	should the updated account set be updated? Almost always should be true.