Some blocks need a real account with an outside provider. Rather than the platform paying for or sharing one key across every bot, these blocks use a key you provide yourself, from your project's Settings tab, under Integrations.
Why bring your own key
A key you provide is yours: you control its permissions, you see its usage on the provider's own dashboard, and any cost or rate limit it runs into is between you and that provider, not something shared with every other bot on the platform.
Getting a Riot Games API key
Riot Games gives out free personal API keys from their developer portal. Once you have one, paste it into your bot project's Settings, Integrations panel and save it. The Get League of Legends Stats block can then look up a Riot ID's rank once a key is configured, it stays League of Legends only, Riot's public API does not expose Valorant rank the same way.
How your key is stored
Your key is encrypted before it's ever saved, the same protection your bot's own Discord token gets. The Integrations panel only ever shows whether a key is configured, never the key itself once saved, remove it and add the new one if you need to rotate it.
Tip: This same Integrations panel is built to hold more than one service, expect it to grow as more bring your own key blocks are added.