Update Usernames.md

docs/tutorials/Usernames.md

@@ -15,8 +15,8 @@ Which is easier to remember and share?
 Subsocial usernames will be useable in any project that supports them, 
 such as dapps built on Subsocial, wallets, and governance platforms.
 
-PolkaVerse also supports Subsocial usernames, allowing you to set a username for your spaces. 
-This makes the URL of your space more human friendly, such as https://polkaverse.com/@subsocial.
+Grill also supports Subsocial usernames, allowing you to set a username for your spaces. 
+This makes the URL of your space more human friendly, such as https://grillapp.net/@subsocial.
 
 Sub.ID supports Subsocial usernames as well. If Alice buys **alice.sub**, 
 then we can simply navigate to **sub.id/alice** to be taken to Alice's **Sub.ID** page.
@@ -25,15 +25,15 @@ Imagine creating a username once, and being able to use it on every app.
 
 ### How do Subsocial usernames work?
 Usernames are stored on the Subsocial blockchain, creating a link between the username and the account that owns it.
-This allows applications such as PolkaVerse to easily access this, 
+This allows applications such as Grill to easily access this, 
 allowing usernames to be used in place of long account addresses.
 
 ### Will there be a minimum length for usernames?
 Yes. The minimum length for usernames is 4 characters, up to a maximum of 63 characters. 
 At the moment, there are no plans for usernames with 1-3 characters.
 
 ### How do I register a username?
-You can register a username on [the registration page](https://polkaverse.com/dd).
+You can register a username on [the registration page](https://grillapp.net/dd).
 
 Registering a username will require you to lock 10 SUB, as well as pay a fee depending on the length of the username.