Again error from IdP if mapped claim is no string

[strehle]

What version of UAA are you running?

develop

How are you deploying the UAA?

I am deploying the UAA

• locally only using gradlew
• using a bosh release I downloaded from bosh.io
• using cf-release
• using cf-deployment
• as part of a commercial Cloud Foundry distribution
• other (please explain)

What did you do?

Configure external IdP where an array is part of id_token, e.g.

email = [ "one", "two" ]

And email is the user_name. Then we ran into same issue then #1831

What did you expect to see? What goal are you trying to achieve with the UAA?

Either a better error, similar to #1831 or a fix like #1925

What did you see instead?

Please include UAA logs if available.