If you are on desktop:
Firstly, click on the invitations tab at the top of the page
Next, use the filters above the table to locate the user that you want to edit invitations for
Hover your cursor over that user. An edit button will now appear
If you are on mobile:
Firstly, click on the users tab at the top of the page
Next, use the filters above the table to locate the user that you want to edit invitations for
Click on the settings button at the end of the row. An edit button will now appear