# Authenticate Using OAuth - Nextcloud

*This has been constructed using the [Nextcloud OAuth2 Documentation](https://docs.nextcloud.com/server/14/admin_manual/configuration_server/oauth2.html?highlight=oauth2) combined with [this issue comment on the nextcloud bugtracker](https://github.com/nextcloud/server/issues/5694#issuecomment-314761326).*

This guide uses the generic OAuth2 module for compatibility with Nextcloud 13 and above (this guide has been tested successfully with Nextcloud 14).

1. Sign-in with an administrator account to your Nextcloud server.

2. Navigate to the OAuth integration settings: Profile Icon (top right) --> Settings.

Then choose Security Settings from the *Administration* part of the list - Don't confuse this with Personal Security Settings, where you would change your personal password!

At the top there's OAuth 2.0-Clients.


3. Add your CodiMD instance by giving it a *name* (perhaps CodiMD, but could be anything) and a *Redirection-URI*. The Redirection-URI will be `\<your-codimd-url\>/auth/oauth2/callback`. Click <kbd>Add</kbd>.


4. You'll now see a line containing a *client identifier* and a *Secret*.


5. That's it for Nextcloud, the rest is configured in your CodiMD via the `CMD_` environment variables!

6. Add the Client ID and Client Secret to environment variables. Make sure you also replace `<your-nextcloud-domain>` with the right domain name.

      CMD_OAUTH2_CLIENT_ID=ii4p1u3jz7dXXXXXXXXXXXXXXX
      CMD_OAUTH2_CLIENT_SECRET=mqzzx6fydbXXXXXXXXXXXXXXXX
      CMD_OAUTH2_AUTHORIZATION_URL=https://<your-nextcloud-domain>/apps/oauth2/authorize
      CMD_OAUTH2_TOKEN_URL=https://<your-nextcloud-domain>/apps/oauth2/api/v1/token
      CMD_OAUTH2_USER_PROFILE_URL=https://<your-nextcloud-domain>/ocs/v2.php/cloud/user?format=json
      CMD_OAUTH2_USER_PROFILE_USERNAME_ATTR=ocs.data.id
      CMD_OAUTH2_USER_PROFILE_DISPLAY_NAME_ATTR=ocs.data.display-name
      CMD_OAUTH2_USER_PROFILE_EMAIL_ATTR=ocs.data.email

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###### tags: `CodiMD` `Docs`