>All prompts and learning resources will be released on our Discord server, and an invite to it shall be e-mailed to the participants on registration. 

I am adding the previous sentence to an official document and am quite confused as to how this sentence shall be structured as something about it does not sound good right now.

I google'd the use of 'whose' for inanimatable objects and got weird answers so could not decide if I could say _...on Discord, whose invite shall be sent..._ 
and, I also could not decide if it would make sense to say _an invite to which shall be sent_ **or** an _invitation to which shall be sent_. 

There are three aspects of this question and I still am quite confused, what is the best way to convey the message?