diff --git a/.env.sample b/.env.sample
index 3c6d7e64..5ded9527 100644
--- a/.env.sample
+++ b/.env.sample
@@ -2,7 +2,3 @@
 INTEGRATION_ID=
 
 WEBHOOK_SECRET=development
-
-# Visit https://github.com/settings/tokens/new to create a new personal access
-# token with `repo` scope.
-GITHUB_TOKEN=
diff --git a/script/console b/script/console
index 9c24fdfa..cb379283 100755
--- a/script/console
+++ b/script/console
@@ -1,7 +1,17 @@
 #!/usr/bin/env node
+// Console for experimenting with GitHub API requests.
+//
+// Usage: GITHUB_TOKEN=xxx script/Console
+//
 
 require('dotenv').config();
 
+if (!process.env.GITHUB_TOKEN) {
+  console.error('GITHUB_TOKEN environment variable must be set.');
+  console.error('Create a personal access token at https://github.com/settings/tokens/new');
+  process.exit(1);
+}
+
 const repl = require('repl').start('> ');
 const GitHubApi = require('github');
 const github = new GitHubApi();
@@ -9,6 +19,6 @@ const github = new GitHubApi();
 github.authenticate({
   type: 'oauth',
   token: process.env.GITHUB_TOKEN
-});
+})
 
 repl.context.github = github;