Disable logging in using a one-time password
To go back to using a regular password:
Open the Security tab.
In the Login method section, click the current login method.
In the list, select Password + sms or Standard password.
On the page that opens, enter a one-time password from the Yandex Key app to confirm the changes.
Set a standard password for your account.
You'll need to create new app passwords for third-party apps and mail importers because your old passwords will stop working after you disable logging in with a one-time password. You can create new passwords on the app password management page.