Create Change-or-add-email-address.md

New settings help article

docs/articles/expensify-classic/settings/account-settings/Change-or-add-email-address.md

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+---
+title: Change or add email address
+description: Update your Expensify email address or add a secondary email
+---
+<div id="expensify-classic" markdown="1">
+
+The primary email address on your Expensify account is the email that receives email updates and notifications for your account. You can add a secondary email address in order to 
+- Change your primary email to a new one.
+- Connect your personal email address as a secondary login if your primary email address is one from your employer. This allows you to always have access to your Expensify account, even if your employer changes.
+
+{% include info.html %}
+Before you can remove a primary email address, you must add a new one to your Expensify account and make it the primary using the steps below. Email addresses must be added as a secondary login before they can be made the primary.
+{% include end-info.html %}
+
+*Note: This process is currently not available from the mobile app and must be completed from the Expensify website.* 
+
+1. Hover over Settings, then click **Account**.
+2. Under the Account Details tab, scroll down to the Secondary Logins section and click **Add Secondary Login**.
+3. Enter the email address or phone number you wish to use as a secondary login. For phone numbers, be sure to include the international code, if applicable. 
+4. Find the email or text message from Expensify containing the Magic Code and enter it into the field. 
+5. To make the new email address the primary address for your account, click **Make Primary**. 
+
+You can keep both logins, or you can click **Remove** next to the old email address to delete it from your account. 
+</div>