Run commands post linking

[FreeSpinner09]

Is your feature request related to a problem?

no

Describe the solution you'd like.

Add the ability to execute commands once the player links with there discord. Providing {user} as a username replacement.

Describe alternatives you've considered.

Using melius commands, or switching mods.

Agreements

• I have searched for and ensured there isn't already an open issue regarding this.
• I have ensured the feature I'm requesting isn't already in the latest supported mod version.

Other

No response