Services
Pastebin Service
This is where you can choose which Paste Service to use.
Metadata Server
This is where you can set where the launcher gets it metadata.
API Keys
Microsoft Authentication
Set this if you want to use your own client ID for Microsoft Authentication.
CurseForge Core API
Set this if you want to use your own CurseForge API key.
Miscellaneous
User Agent
Set this if you want to use a custom User Agent.