Messages -- What should be returned by the userinfo endpoint if the scope was just 'openid'

[Former user]

The spec is currently silent on what the userinfo endpoint should return if the authorization request scope parameter contains only 'openid'.

[John Bradley]

Make it user_id

[John Bradley]

re #335 make openid scope provide user_id from userinfo endpoint

→ 21e13ae5f775

[John Bradley]

Fixes #335 make openid scope provide user_id from userinfo endpoint

→ 0974b1a229b3