Return UserSession type in getUserSession

[ImBoop]

Since you aren't defining a return type, TypeScript has to do a best-effort to determine it. However, this is causing it to bypass custom session types.

To fix, I suggest having this line updated to return UserSession. If needed, I can make a PR, but it may be some time before I'll have availability.

Line is here

[blouflashdb]

Yeah I now also get type errors.

I extend the UserSession type

interface UserSession {
challenge: string
}

but since getUserSession is not returning the type anymore I get type errors.