How do I auto-enable GitHub dependabot alerts? API?

How do I auto-enable GitHub dependabot alerts? Can it be enabled via API?

• For repositories of a user: alerts and security updates can be enabled for all repositories at https://github.com/settings/security_analysis
• For repositories in an organization: the settings live at https://github.com/organizations/{org}/settings/security_analysis, where {org} is a placeholder for the organization

There is a REST API for dependabot alerts, but it doesn't let you manage if alerts or updates are enabled.