SignIn "callbackURL" not functioning as expected.

await authClient.signUp.email(
                {
                    email: value.email,
                    password: value.password,
                    name: `${value.forename} ${value.surname}`,
                    callbackURL: "/app",
                },
                {
                    onRequest: () => {
                        setDebounce(true);
                    },
                    onError: (ctx) => {
                        setDebounce(false);
                        toast.error(ctx.error.message);
                    },
                },
            );

await authClient.signUp.email(
                {
                    email: value.email,
                    password: value.password,
                    name: `${value.forename} ${value.surname}`,
                    callbackURL: "/app",
                },
                {
                    onRequest: () => {
                        setDebounce(true);
                    },
                    onError: (ctx) => {
                        setDebounce(false);
                        toast.error(ctx.error.message);
                    },
                },
            );