Shows a message that looks like this:

I.e., it tells you that an account was created, but it wasn't. One way to fix this would be to have the redeemSharingInvitation endpoint reply with an indication of whether or not this was a new user. But, I'm not actually sure that's the right way to go. The SharedImages app in this case already had the information that the user signed in as an existing user. We should be able to retrieve that state locally to the app somehow.
Shows a message that looks like this:
I.e., it tells you that an account was created, but it wasn't. One way to fix this would be to have the redeemSharingInvitation endpoint reply with an indication of whether or not this was a new user. But, I'm not actually sure that's the right way to go. The SharedImages app in this case already had the information that the user signed in as an existing user. We should be able to retrieve that state locally to the app somehow.