Fix NUser constructor call: use positional args not object

NUser takes (method, pubkey, signer) as separate args.
Was passing {pubkey, signer} as first arg so pubkey was always undefined.

Co-authored-by: shakespeare.diy <assistant@shakespeare.diy>

src/hooks/useCurrentUser.ts

@@ -31,7 +31,7 @@ export function useCurrentUser() {
         const signer = isCapacitor
           ? new CapacitorAmberSigner(amberLogin.pubkey)
           : new AmberSigner(amberLogin.pubkey);
-        return new NUser({ pubkey: amberLogin.pubkey, signer });
+        return new NUser('x-amber', amberLogin.pubkey, signer);
       }
       // Other login types can be defined here
       default: