Merge pull request #229398 from garrodonnell/godonnell-issue-add-api-connector

[B2C][GitHub Issue] Add an API connector to a sign-up user flow

Author: v-dirichards

articles/active-directory-b2c/add-api-connector.md

@@ -331,7 +331,7 @@ Content-type: application/json
 {
     "version": "1.0.0",
     "action": "ShowBlockPage",
-    "userMessage": "There was a problem with your request. You are not able to sign up at this time.",
+    "userMessage": "There was a problem with your request. You are not able to sign up at this time. Please contact your system administrator",
 }
 
 ```