403 when trying customerAccessTokenCreate

Retired Boards Appdev Custom Storefronts
1

Hello everyone,

I have been trying to develop a way to login my users in my within the Storefront API.
I currently have an Express + Firebase functions that act as my backend.
So far I have created a test shop and installed the headless channel and I have been able to do a request using Postman to retrieve some products.
My current code:

const unrestrictedHeaders = {
    'Content-Type': 'application/graphql',
    'X-Shopify-Storefront-Access-Token': shopifyStoreFrontAPIUnrestricted
};

router.post('/create-token', async (req, res) => {
    const query = `mutation {
        customerAccessTokenCreate({"input": {"email": "${req.body.email}", "password": "${req.body.password}"}}) {
            customerAccessToken {
                accessToken
            }
            customerUserErrors {
                message
            }
            }
        }`;

    try {
        const response = await axios.post(shopifyEndPoint, { query }, { unrestrictedHeaders });
        res.send(response.data);
    } catch (error) {
        console.error(error);
        res.status(500).send(error.message);
    }

});

Any help pointing the right direction would be awesome. Also it would be great to have a code repository with examples as I haven’t been able to locate a proper one with full code examples.

Best,
Stockers