Do not verify token during tests

src/index.ts

@@ -28,6 +28,10 @@ const dataSources = () => ({
 });
 
 const context = async ({ req }) => {
+  if (process.env.NODE_ENV == 'test') {
+    return { auth: 'testuser' };
+  }
+
   const authHeader = req.headers.authorization || '';
   if (authHeader.startsWith('Bearer ')) {
     const token = authHeader.substring(7, authHeader.length);