current user username instead of "profile" text

src/blog/Blog.tsx

@@ -108,7 +108,7 @@ export default function Blog(props: { disableCustomTheme?: boolean }) {
                     color="primary"
                     onClick={() => setShowProfile(true)}
                   >
-                    Profile
+                    {currentUser.username}
                   </Button>
                 </>
               )}