For Azure DevOps configuration first of all you have to retrieve a unique personal account token to be used by Snyk. You can find more information about it here in the article.
Also ensure, to make following configurational changes so as to connect to your repository :
- Expiry—We recommend choosing an expiration date for this token that is far in the future to avoid breaking integration.
- Scopes—Custom defined
- Code—Read & write
You can read more about it here