Google supports several methods of site verification in Google Search Console. The most popular one is inserting a certain code to the site's home page. This method requires access to the site source code which isn't supported in Inita at the moment.
The only verification method for Inita sites is via custom domain:
1. You should obtain a domain and connect it to Inita site. Refer to instructions Connecting domain to Inita site or Buying a domain.
2. You can now prove your site ownership by adding necessary DNS settings to the domain.
For step-by-step guide, follow to Google help page: Domain name verification.