How to get the sample ID number to print with variant Information

Question

[bennen2]

Hello, I am very new to bioinformatics and I am working on analyzing a file. Using code: bcftools query -f '%CHROM\t%POS[\t%GT\t]\n' Regiononly.vcf.gz Prints out the genotypes and one sample is showing heterozygous for the variant of interest. However I cannot figure out the code to print the sample ID for the heterozygous individual.

Thank you in advance for your help. If more context is needed, please let me know.