For public Github repositories, Fix PRs will be opened by Snyk-Bot.
For private Github repositories, Collaborator permissions are required to open fix PRs. When automatic pull requests are enabled for private repositories, Snyk selects randomly from the list of users with the right Github permissions and opens the PR on that user's behalf.
You can control which user creates Fix PRs in Github by following this article: https://docs.snyk.io/integrations/git-repository-scm-integrations/introduction-to-git-repository-integrations/opening-fix-and-upgrade-pull-requests-from-a-fixed-github-account