I'm trying to get a XUID from the https://user.auth.xboxlive.com/user/authenticate endpoint. Sadly, every attempt I make, results in an error 400.

Here's what my provider looks like:

AzureADProvider({
            clientId: process.env.AZURE_AD_CLIENT_ID as string,
            clientSecret: process.env.AZURE_AD_CLIENT_SECRET as string,
            tenantId: process.env.AZURE_AD_TENANT_ID,
            httpOptions: { timeout: 10000 },
            authorization: { params: { scope: "openid offline_access profile email"}}
        })

Here's my callback:

callbacks: {
        async jwt({ token, user, account }: { token: any, user: any, account: any }) {
            if (account && user) {
                const accessToken = await account.access_token
                const minecraft = await getMinecraft(accessToken)
                return {
                    accessToken: account.id_token,
                    accessTokenExpires: account?.expires_at
                        ? account.expires_at * 1000
                        : 0,
                    refreshToken: account.refresh_token,
                    user,
                    minecraft: minecraft
                };
            }

            if (Date.now() < token.accessTokenExpires - 100000 || 0) {
                return token;
            }
        },
        async session({ session, token }: { session: any, token: any }) {
            if (session) {
                session.user = token.user;
                session.error = token.error;
                session.accessToken = token.accessToken;
            }
            return session;
        },
    },

And finally, here's my getMinecraft() function, that should normally work but here, doesn't:

async function getMinecraft(accessToken: string) {
    const body1 = JSON.stringify({
        "RelyingParty": "http://auth.xboxlive.com",
        "TokenType": "JWT",
        "Properties": {
            "AuthMethod": "RPS",
            "SiteName": "user.auth.xboxlive.com",
            "RpsTicket": "d="+accessToken
        },
    })
    const res1 = await fetch("https://user.auth.xboxlive.com/user/authenticate", {
        method: "POST",
        headers: {
            "Content-Type": "application/json",
            "Accept": "application/json",
            "x-xbl-contract-version": "1"
        },
        body: body1
    })
    console.log(res1)
    console.log(body1)
}

I've followed the guide from: https://mojang-api-docs.gapple.pw/authentication/msa

Any help would be appreciated! If you don't understand something feel free to ask.