How to convert the variant call format file (.vcf file) into a txt file with R?

Question

I would like to convert these 3 lines (from a .vcf file):

##bcftools_annotateCommand=annotate -a /mnt/storage/home/gh13047/mr-eve/vcf-reference-datasets/dbsnp/dbsnp.v153.b37.vcf.gz -c ID -o /mnt/storage/private/mrcieu/research/scratch/IGD/data/dev/ukb-d-import/processed/ukb-d-20544_1/ukb-d-20544_1.vcf.gz -O z /mnt/storage/private/mrcieu/research/scratch/IGD/data/dev/ukb-d-import/processed/ukb-d-20544_1/ukb-d-20544_1_data.vcf.gz; Date=Mon Nov 25 15:37:00 2019
#CHROM  POS     ID      REF     ALT     QUAL    FILTER  INFO    FORMAT  ukb-d-20544_1
1       692794  rs530212009     CA      C       .       PASS    AF=0.111693     ES:SE:LP:AF:SS:ID       0.000379398:0.000798869:0.197332:0.111693:117706:1_692794_CA_C

to a txt.gz file with R:

CHROM  POS     ID      REF     ALT     QUAL    FILTER  INFO    FORMAT  ukb-d-20544_1
1       692794  rs530212009     CA      C       .       PASS    AF=0.111693     ES:SE:LP:AF:SS:ID       0.000379398:0.000798869:0.197332:0.111693:117706:1_692794_CA_C

I tried with MungeSumstats but it does not work.