Why is axios and react not working with express api?

Hello everyone,
So I have an express node api. I’ve tested it with postman and Get requests work perfectly. So I get this error in my console.

Access to XMLHttpRequest at 'http://localhost:8000/users' from origin 'http://localhost:3000' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.

Does anyone know a solution? Thank you in advance.

Nvm just found the answer. I justed needed to add a permission to my GET request route in express/node

    res.setHeader("Access-Control-Allow-Origin", "http://localhost:3000");

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