When registering with Valorant, you must enter your data - login (name, nickname) and password. Sometimes users write "User name must be unique" when entering a login.
This means that such a name is already taken by another player. In that case, you have to come up with another nickname. Perhaps add some numbers, additional letters at the end.
To avoid bothering too much with coming up with a name yourself, you can use a free nickname generator. Go to the service https://nick-name.ru/ru/generate/, select the first letter of the name, the number of characters and click on the Generate button. With each click, the service will generate a new nickname. You can use the one you like as it is or change it for yourself.
