Fix password reset when querying for emails with upcase characters (fixes #9059) (#9707)

* downcase updating an email to be consistent with creating

* add tests to ensure downcase of email for create/update

* create migration to downcase existing User objects

* delete 'only'

* change gmail to example

* add trailing comma from lint error

* search for emails with at least one capital letter

* fix query in order to search for any email with at least one capital letter

* batch process effected users with at least one capital in email

* update script for batch process effected users

test/api/v3/integration/user/auth/POST-register_local.test.js

@@ -357,6 +357,21 @@ describe('POST /user/auth/local/register', () => {
       });
     });
 
+    it('sanitizes email params to a lowercase string before creating the user', async () => {
+      let username = generateRandomUserName();
+      let email = 'ISANEmAiL@ExAmPle.coM';
+      let password = 'password';
+
+      let user = await api.post('/user/auth/local/register', {
+        username,
+        email,
+        password,
+        confirmPassword: password,
+      });
+
+      expect(user.auth.local.email).to.equal(email.toLowerCase());
+    });
+
     it('fails on a habitica.com email', async () => {
       let username = generateRandomUserName();
       let email = `${username}@habitica.com`;