feat: add email custom claim

app.js

@@ -15,6 +15,7 @@ let issuer = process.env.ISSUER || 'localhost:3333'
 let jwksOrigin = `https://${issuer}/`
 const audience = process.env.AUDIENCE || 'https://generic-audience'
 const adminCustomClaim = process.env.ADMIN_CUSTOM_CLAIM || 'https://unbound.se/admin'
+const emailCustomClaim = process.env.EMAIL_CUSTOM_CLAIM || 'https://unbound.se/email'
 
 const debug = Debug('app')
 
@@ -54,7 +55,9 @@ app.post('/oauth/token', (req, res) => {
     keyid: thumbprint
   })
 
-  const token = session.customClaims.reduce((acc, claim) => {
+  const emailClaim = {}
+  emailClaim[emailCustomClaim] = session.email
+  const token = [...session.customClaims, emailClaim].reduce((acc, claim) => {
     return {
       ...acc,
       ...claim