post https://auth.overledger.io/oauth2/token
Use Basic Authentication to retrieve an OAuth2 token.
All Overledger APIs require an OAuth2 access token to be provided in the header's Authorization parameter, in the format ^Bearer [A-Za-z0-9\-_. ]{1,5010}$.
To generate an access token, use this API and set username = clientId and password = clientSecret where clientId and clientSecret are found in Quant Connect as described here.