flattens user into collections

src/tests/credentials.js

@@ -1,2 +1,2 @@
-exports.email = 'test@test.com';
+exports.username = 'test@test.com';
 exports.password = 'test123';

src/tests/globalSetup.js

@@ -8,7 +8,7 @@ const url = config.serverURL;
 const globalSetup = async () => {
   global.PAYLOAD_SERVER = server.start();
 
-  const response = await fetch(`${url}/api/first-register`, {
+  const response = await fetch(`${url}/api/users/first-register`, {
     body: JSON.stringify({
       username,
       password,