post https://integration-api.getfront.com/api/v1/token/refresh
Refresh auth token of the connected institution.
Some institutions do not require tokens to be refreshed.
The following institutions require custom flows:
WeBull: AuthToken should be provided along with the RefreshToken
Vanguard: security settings may activate MFA, requiring user action.
If MFA is triggered, a second refresh request should be sent.
Second request should contain MFA code and access token obtained from initial response.
Bitfinex Direct: Expired Access Token is used as Refresh token. Use this endpoint to
trade it for a new one