Add OnSuccessHandler and OnFailureHandler to logoutUser() function

[yungkienpoh-prestolabs]

Hi, I noticed in logoutUser() function, there are no OnSuccessHandler and OnFailureHandler parameters for us to handle the cases where calling disableDevice API returns error. disableDeviceForCurrentUser already has these 2 parameters for handling such case. So, my request is to add these 2 parameters to logoutUser() and logoutPreviousUser() function, so that we can handle the error cases when logging out the user.

The end result should be something like this:

func logoutUser(withOnSuccess onSuccess: OnSuccessHandler? = nil, onFailure: OnFailureHandler? = nil) {
    logoutPreviousUser(withOnSuccess: onSuccess, onFailure: onFailure)
}

private func logoutPreviousUser(withOnSuccess onSuccess: OnSuccessHandler? = nil, onFailure: OnFailureHandler? = nil) {
    ...
    if config.autoPushRegistration {
        disableDeviceForCurrentUser(withOnSuccess: onSuccess, onFailure: onFailure)
    }
    ...
}

[jena-chakour]

Hi @yungkienpoh-prestolabs thanks for surfacing this! Our team will take this into consideration for future work :)