---
title: Authentication
sidebar_position: 2
---

Market Data's Sheets Add-on uses **automatic Google Authentication** to authorize requests to Market Data's servers. This means that once you login to Sheets using your Google account, the Market Data Add-on will automatically link to your Market Data account _as long as you signed-up for a Market Data account using the same Google e-mail address_.

:::warning
If you registered for Market Data with an e-mail address different from the one you use to log in to Google, you must update your Market Data account's e-mail to match your Google Sheets login e-mail.
:::

## Changing Your Market Data Account E-mail Address

1. **[Login](https://dashboard.marketdata.app/marketdata/profile)** to your Market Data account.
2. This will open your account **Profile**.
3. Click on the **E-Your E-Mail Address** field.
4. Enter the e-mail address you use to login to Google Sheets.
5. Click on the **Save Profile** button.
6. Confirm the change by clicking on the confirmation link in the e-mail you receive.

## Troubleshooting

Almost all issues related to authentication can be solved by changing your Market Data account's e-mail address to the same e-mail address you use to login to Google Sheets.

If you continue to experience issues, please open a support ticket at our [helpdesk](https://dashboard.marketdata.app/marketdata/helpdesk).

### Multiple Google Accounts

If you have multiple Google accounts, you will need to make sure that you link your Market Data account with the same Google account you use to login to Google Sheets.