I am making an admin panel for my telegram bot using React and Nest.js

The logout endpoint should be handled by the backend server which is localhost:3000 (localhost:3001 is my frontend) but calling localhost:3001/auth/logout works and localhost:3000/auth/logout does not

using await fetch(`localhost:3001/auth/logout`, works but await fetch(`${process.env.REACT_APP_API_URL}/auth/logout`, doesnt work, it should work with 3000(backend) not 3001(frontend), its the same with all the other endpoints too.

 REACT_APP_API_URL=http://localhost:3000

const handleSignOut = async () => {
        await fetch(`${process.env.REACT_APP_API_URL}/auth/logout`, {
            method: 'GET',
            credentials: 'include' // necessary for cookies if sessions are used
        })
            .then(response => {
                if (response.ok) {
                    localStorage.removeItem('user'); // Clear local storage if used
                    sessionStorage.removeItem('user'); // Clear session storage if used
                    window.location.href = `http://localhost:3001/admin`; // Redirect after successful logout
                } else {
                    throw new Error('Logout failed with status: ' + response.status);
                }
            })
            .catch(error => {
                console.error('Logout failed:', error);
            });
    };

 @Get('logout')
    async logout(@Req() req, @Res() res, @Session() session) {
        req.session.destroy((err) => {
            if (err) {
                console.error('Session destruction failed:', err);
                res.status(500).json({ message: 'Failed to log out' });
            } else {
                res.redirect(`${process.env.REACT_APP_DASHBOARD_URL}/admin`);
            }
        });
    }

CORs is enabled still isnt working