A Zero Risk Service
In order for us to claim a username for you, we DO NOT require login access to your social media profile.
As such, it can be confirmed that the username change is performed and completed via internal teams at respective social networks.
Given that the process of username claim is done formally via internal teams at social networks, you can rest assured that are no risks to claiming a username.
Additionally, as we update your username, your posts/content/login details - everything stays as is. The only thing that changes is your username.