Google Webmaster tool changed to Google Search Console in 2015.
I use one such tool after a long interval. So, writing setup steps for it.
- You have the authority to control DNS.
Access to Google Search Console, then enter your domain.
Resist TXT record with the value to your DNS.
Check your TXT record.
Switch to Google Search Console, close the window by clicking the following button:
The result is here. Leaving until it changes.