Question about databases contents

[tyjiang1997]

Hi, thank you very much for your project. And could you please tell me what content should be placed in the databases of AACNEN data set right here.
aachen/
├── aachen.db
├── day_time_queries_with_intrinsics.txt
├── night_time_queries_with_intrinsics.txt
├── databases/
├── images_upright/
│   ├── db/
│   │   └── ...
│   └── query/
│      └── ...
└── models/
   └── hfnet_model/
      ├── cameras.bin
      ├── images.bin
      └── points3D.bin