PLT-4141 Validating SAML attributes (#4002)

i18n/en.json

@@ -2555,6 +2555,10 @@
     "id": "ent.migration.migratetoldap.user_not_found",
     "translation": "Unable to find user on AD/LDAP server: "
   },
+  {
+    "id": "ent.saml.attribute.app_error",
+    "translation": "SAML login was unsuccessful because one of the attributes is incorrect. Please contact your System Administrator."
+  },
   {
     "id": "ent.saml.build_request.app_error",
     "translation": "An error occurred while initiating the request to the Identity Provider. Please contact your System Administrator."