You can link one clan to your Discord user account.
/link createclan_tag:#PLAYER_TAG
Verify account
You need the API token from the in-game settings to verify an account.
/verifyplayer_tag:#PLAYER_TAGtoken:API_TOKEN
Is my API token safe to share?
Yes, your API token cannot be used to steal your account or gain access to any account-related data. It only verifies your identity with third-party services. The token resets periodically and becomes invalid after each use.
How do you get your API token?
Open Clash of Clans and navigate to Settings > More Settings
Scroll down to the bottom and click on Show next to the API Token