Based on your API key I can provide you a lot of information about your GW2 account and everything connected to it. All of this is available for you after you have added your API key. Your key will be stored with your discord name. So you only need to add your key once.
Some examples
Build Code Preview
Aleeva also automatically converts build codes into preview images. If needed, this can be disabled by adding [-chat_link_parsing] to the channel's topic.