typescript - how do i refresh an access token in auth.js or next-auth - Stack Overflow

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I am creating a web application that allows users to login using their Spotify accounts. The authorization is being handled by auht.js also known as next-auth, but the problem arises when my initial access token expires, and I am trying to refresh it

tried handling the refresh token by first checking if it has expired, if not then send a post request to the Spotify token endpoint and refresh it.

 export const { handlers, auth, signIn, signOut } = NextAuth({
  providers: [
    Spotify({
      authorization:
        " user-read-email user-top-read playlist-read-private playlist-read-collaborative",
      clientId: process.env.AUTH_SPOTIFY_ID,
      clientSecret: process.env.AUTH_SPOTIFY_SECRET,
    }),
  ],
  callbacks: {
    async jwt({ token, account }) {
      if (account) {
        return {
          ...token,
          access_token: account.access_token,
          refresh_token: account.refresh_token,
          expires_at: account.expires_at,
        };
      }

      // Return previous token if not expired
      if (Date.now() < (token.expires_at as number) * 1000) {
        console.log(
          `expiriing at ${
            (((new Date((token.expires_at as any) * 1000) as any) -
              Math.floor(Date.now())) as any) /
            (60 * 1000)
          } minutes`
        );

        return token;
      }

      // Token expired, try refreshing
      try {
        const response = await fetch(";, {
          method: "POST",
          headers: {
            "Content-Type": "application/x-www-form-urlencoded",
            Authorization: `Basic ${Buffer.from(
              `${process.env.AUTH_SPOTIFY_ID}:${process.env.AUTH_SPOTIFY_SECRET}`
            ).toString("base64")}`,
          },
          body: new URLSearchParams({
            grant_type: "refresh_token",
            refresh_token: token.refresh_token as any,
          }),
        });

        const tokens = await response.json();

        if (response.ok) {
          ("no error on response");
        }

        console.log(" token:", tokens);

        return {
          ...token,
          access_token: tokens.access_token,
          expires_at: Math.floor(Date.now() / 1000 + tokens.expires_in),
          refresh_token: tokens.refresh_token ?? token.refresh_token,
        };
      } catch (error) {
        // Force sign out if refresh fails
        return { ...token, error: "RefreshAccessTokenError" };
      }
    },
    async session({ session, token }) {
      return {
        ...session,
        access_token: token.access_token,
        refesh_token: token.refresh_token,
      };
    },
  },
});

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