How to use the jose.JWT.decode function in jose

if (!dPoPConfig.enabled) {
        return undefined;
      }

      if ('dpop' in instance(this)) {
        return instance(this).dpop;
      }

      const token = this.ctx.get('DPoP');

      if (!token) {
        return undefined;
      }

      try {
        const { header, payload } = JWT.decode(token, { complete: true });
        let key;

        if (header.typ !== 'dpop+jwt') {
          throw new Error('typ must be dpop+jwt');
        }
        if (typeof header.alg !== 'string' || !header.alg || header.alg === 'none' || header.alg.startsWith('HS')) {
          throw new Error('invalid alg');
        }
        if (!instance(provider).configuration('dPoPSigningAlgValues').includes(header.alg)) {
          throw new Error('unsupported alg');
        }
        if (typeof header.jwk !== 'object' || !header.jwk) {
          throw new Error('header must have a jwk');
        }
        try {
          key = JWK.asKey(header.jwk);