ovr_ApplicationLifecycle_GetSessionKey Function
The launcher, which we know and trust can use this to create a key, pass it to the UWP app, which will be able to register using it as the original application.
A message with type ovrMessage_ApplicationLifecycle_GetSessionKey will be generated in response.
If no error occurred, the message will contain a payload of type const char *. Extract the payload from the message handle with
ovr_Message_GetString().
ovrRequest ovr_ApplicationLifecycle_GetSessionKey()