I'm sending the following request:
ClientModels::FAddGenericIDRequest: AuthenticationContext ClientSessionTicket "xxxxxxxxxxxxxxxx---xxxxx-xxxxxxxxxxxxxxx-xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx=" EntityToken "xxxxxxxxxxxxxxxxxxxx...xxxxxxxxxxxxxxxxxxxxxxxx" DeveloperSecretKey Empty PlayFabId L"xxxxxxxxxxxxxxxx" GenericId ServiceName "NULL_OSS" UserId "xxxxxxxx-xxx-41C210B04FE4CDBBEF4523939C8384C5"
It fails with error code 1000. Is there anything obviously wrong with the GenericID? Is it violating some undocumented constraint, perhaps? Does the ServiceName have to be setup somewhere first before it can be used in the AddGenericID call?
I'm asking because other API calls surrounding this call succeed, so there seems to be nothing wrong with the authentication context.