This is the UX presented when launching a game that allows the user to select a user.
The first IStorage is identical to Common Arguments from swkbd.
This has size 0xA0 and seems to only affect the UI display. Typical value is all zero with byte 0x96 equal to 0x01
|0x0||0x8||Result (0 = Success, 2 = Failure)|
|0x8||0x10||UUID of selected user|
|0x18||End of Struct|
Homebrew should push a common arguments struct and the typical UserSelectionConfig struct as well. After pushing in the data and calling start, homebrew should wait upon the PopOutDataEvent and then pop a single IStorage to obtain the result structure described above.