How to accept or reject an invitation to play a role

The roles you can be invited to in Airevent are,

If you receive an email inviting you to play a role in Airevent, you can do the following:

Go to the Airevent website
Click login in the top menu, then login with the email that was used to invite you
A popup will appear that says invitation waiting
Check the box on the role(s) that you want you want to accept
Click the accept button
By not accepting a role, you are declining a role