Il 502 add elo how to

[MerlinKallenbornAA]

Description

No description.

Before Merging

• [ ] Review the code changes
  • Unused print / comments / TODOs
  • Missing docstrings for functions that should have them
  • Consistent variable names
  • ...
• [ ] Update changelog.md if necessary
• [ ] Commit messages should contain a semantic label and the ticket number
  • Consider squashing if this is not the case