My executrix after my death

I am not familiar with the technology for that. I never heard of an authenticator application. I never really adapted to a phone being for any other purpose than voice conversations. Alexander Graham Bell only intended for his invention to be used for voice conversations. For computer work, I only use my desktop computer. However, I have adapted well to receiving codes as text on my cell phone. Many people decades younger than me let their whole lives revolve around their smartphone.