As the title says I was wondering about refreshing the access token, Does NextAuth does that automatically?
Or as the docs say, you have to implement it manually?

          // https://accounts.google.com/.well-known/openid-configuration
          // We need the `token_endpoint`.
          const response = await fetch("https://oauth2.googleapis.com/token", {
            headers: { "Content-Type": "application/x-www-form-urlencoded" },
            body: new URLSearchParams({
              client_id: process.env.GOOGLE_ID,
              client_secret: process.env.GOOGLE_SECRET,
              grant_type: "refresh_token",
              refresh_token: token.refresh_token,
            }),
            method: "POST",
          })

          const tokens: TokenSet = await response.json()

          if (!response.ok) throw tokens

          return {
            ...token, // Keep the previous token properties
            access_token: tokens.access_token,
            expires_at: Math.floor(Date.now() / 1000 + tokens.expires_in),
            // Fall back to old refresh token, but note that
            // many providers may only allow using a refresh token once.
            refresh_token: tokens.refresh_token ?? token.refresh_token,
          }