discord.gg is not part of Donut Team. Never enter your Donut Team password on any non-Donut Team website.
The site you are trying to visit to has either multiple communities/areas, communities/areas with less moderation than desired or communities/areas with no moderation at all. This means content such as pornography, shock content, gore or piracy may be present. This does not necessarily mean the link you are trying to navigate to is inherently an unsafe link. Proceed with caution.
The site you are trying to access is using a secure protocol in the requested URL. This does not make a site trustworthy by default, but it does create a secure connection between your computer and the server you are connecting to.