Add whitehall basic_auth_credentials for integration

modules/govuk/manifests/apps/link_checker_api.pp

@@ -53,6 +53,10 @@
 #   The token used to bypass the rate limiting on GOV.uk
 #   Default: undef
 #
+# [*govuk_basic_auth_credentials*]
+#   Basic auth credentials for Whitehall used on integration.
+#   Default: undef
+#
 class govuk::apps::link_checker_api (
   $db_hostname = undef,
   $db_username = 'link_checker_api',
@@ -67,6 +71,7 @@
   $redis_port = undef,
   $secret_key_base = undef,
   $rate_limit_token = undef,
+  $govuk_basic_auth_credentials = undef,
 ) {
   $app_name = 'link-checker-api'
 
@@ -114,6 +119,13 @@
     }
   }
 
+  if $govuk_basic_auth_credentials != undef {
+    govuk::app::envvar { "${title}-GOVUK_BASIC_AUTH_CREDENTIALS":
+      varname => 'GOVUK_BASIC_AUTH_CREDENTIALS',
+      value   => $govuk_basic_auth_credentials,
+    }
+  }
+
   if $::govuk_node_class !~ /^development$/ {
     govuk::app::envvar::database_url { $app_name:
       type     => 'postgresql',