Email and SMS 6 digit codes for client work

This happens a lot. I get a new client and they have 17 different accounts at places like twilio, google, apple, heroku, github, etc. and they are not technical people. They can't handle instructions like "login to heroku and invite me." So they end up sending me their logins and ask me to login as them. But each time there is a 6 digit code send to the client's phone number and sometimes email. Sometimes both! And I have to ask the client for the code. But they are busy, in meetings etc so by the time they give me the code it has expired. How can I make this situation better?