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

TdAmeritrade: refresh token should also be refreshed.
CreateNewRefreshToken parameter should be set to true in order
to refresh the refresh token for TdAmeritrade.

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

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