Dynamic max age value

[Barresider]

Hello,
I want to give the user an optional way to extend the default jwt session expiration, so basically a "Keep me signed in" button. So I need to set the maxAge for the jwt token dynamically.

My code looks like this:

export const authOptions: NextAuthOptions = {
  session: {
    strategy: 'jwt'
  },
  jwt: {
    encode: async (params) => {
      return encode({
        ...params,
        maxAge: params.token?.keepSignedIn ? ONE_MONTH_SECONDS : HALF_HOUR_SECONDS
      });
    },
    decode: async (params) => {
      try {
        return decode(params);
      } catch {
        return null;
      }
    }
  },
  callbacks: {
    async jwt(params) {
      return {
        ...params.token,
        keepSignedIn: params.user?.keepSignedIn ?? params.token?.keepSignedIn ?? false,
      };
    }
  },
  providers: [
    CredentialsProvider({
      name: 'Credentials',
      credentials: {
        username: { label: 'Username', type: 'text' },
        password: { label: 'Password', type: 'password' },
        keepSignedIn: { label: 'Keep signed in', type: 'checkbox' },
      },
      async authorize(credentials, req) {
        const { username, password, keepSignedIn } = credentials || {};

        const user = await prisma.user.findFirst({
          where: {
            username,
          },
        });

        if (!user || !password || !bcrypt.compareSync(password, user.password)) {
          return null;
        }

        return {
          ...user,
          keepSignedIn: keepSignedIn ?? false,
        };
      },
    }),
  ],
}

Currently it throws the error "'JWTExpired: "exp" claim timestamp check failed\n'". I can't figure out where to catch that error. Or is there even a better way of implementing this behaviour?