We are also hit with similar limitation. Many of the API (in house) we want to connect are enabled with either Client Credentials or Password grant type, both of which are not supported by SnapLogic. We have a workaorund with dynamic oauth account, but we have to generate token ourself for which we have to store the keys in configuration file or expression library, which is not encrypted like in the case of account.
Not sure what is stopping SnapLogic to provide this enhancement, these are straight forward grant types to accommodate.
