fix cypher to have signup verification to block posts of groups for new users

backend/src/db/graphql/authentications.js

@@ -19,6 +19,7 @@ export const signupVerificationMutation = gql`
       nonce: $nonce
       termsAndConditionsAgreedVersion: $termsAndConditionsAgreedVersion
     ) {
+      id
       slug
     }
   }

backend/src/schema/resolvers/registration.js

@@ -95,6 +95,13 @@ const signupCypher = (inviteCode) => {
       SET user.showShoutsPublicly = false
       SET user.sendNotificationEmails = true
       SET email.verifiedAt = toString(datetime())
+      WITH user
+      OPTIONAL MATCH (post:Post)-[:IN]->(group:Group)
+        WHERE NOT group.groupType = 'public'
+      WITH user, collect(post) AS invisiblePosts
+      FOREACH (invisiblePost IN invisiblePosts |
+        MERGE (user)-[:CANNOT_SEE]->(invisiblePost)
+      )
       RETURN user {.*}
     `
   return cypher