When I asked in a call recently. It sounds like it is transparent to us. When the SymXchange is created you will need to add all the privileges needed, and also the repgens ran in the Symxchange Common parameters.

For config use WEDGE_ADDRESS_CONFIGS (https://docs.q2developer.com/tutorials/online_banking/configuration.html?highlight=wedge_Address) Values cannot have < or &,maybe more. For these use HTML equivalent, example & = &

In an SDK page the data in self.account_list: houses the currently logged in data:
Run repgen in Symitar (https://docs.q2developer.com/tutorials/q2_cores/index.html):
#Repgen to run
query = await self.core.build_base_query('SYC.REPGENRUNNER',
...