Refactor reloadUsername in auth.service to remove debug logs, simplify subscription handling, and add null check before invocation.

frontend/src/app/services/auth.service.ts

@@ -47,17 +47,14 @@ export class AuthService {
   }
 
   private reloadUsername() {
-    console.log("Reloading username");
-    this.loginService.getUsername().pipe(
-      tap(username => {
-        console.log("Username: ", username);
+    this.loginService.getUsername().subscribe({
+      next: (username) => {
         this._username.set(username.username);
-      }),
-      catchError(error => {
-        console.log("Error: ", error);
+      },
+      error: (error) => {
         return throwError(() => error);
-      })
-    )
+      }
+    });
   }
 
   /**
@@ -90,7 +87,9 @@ export class AuthService {
       console.log("User claims: ", claims);
       this.userClaimsSubject.next(claims);
       this.isAuthenticatedSubject.next(true);
-      this.reloadUsername();
+      if (this.username() == null) {
+        this.reloadUsername();
+      }
       return true;
     } catch (e) {
       this.logout();