At the moment Linktree profiles are connected to the email address, username and password you used to sign-up. Unfortunately you can't customize your URL at this stage, so make sure you are signing up with the correct username you want to use.
We are working on integrating the custom URL feature into Linktree so our users can create their own URLs and connect a custom domain straight to their Linktree profile. We’ll update you as soon as we can on this.
If you’re worried about the look of the URL, please know we’ve worked hard to make sure Linktree is a globally recognized URL and your visitors are very used to seeing Linktree URLs. It’s a trusted, secure link used by some of the world’s biggest brands, musicians, celebrities and influencers. You’re in good company.