Blocked account

since I enabled 2 step verification in my account I can’t log in. Analyzing the traffic from a browser I see:

429 Too Many Requests


I have two thermostats in my account. The only ‘different’ setup is that I have configured my IFTTT account and it’s linked to my Nest account.

Do you have experience with IFTTT and Nest account linked?
Is there a way to unblocked my account?

Thanks in advance,