I am trying to create a Data Cube with Open Data Cube for my Bachelor's Thesis. In the Python-Files from Open Data Cube to prepare the data for indexing there is a XML-File with metadata needed: https://github.com/opendatacube/datacube-dataset-config/blob/master/agdcv2-ingest/prepare_scripts/landsat_collection/usgs_ls_ard_prepare.py
But when I download Landsat 8 data from USGS there is only a txt-File with metadata and no xml-File. Where do I get this xml-File?