Add an SSO domain to an organization

➕ Bencher Plus: Add a single sign-on (SSO) domain to an organization. The user must be an admin on the server to use this route. When a user authenticates with the server, the domain portion of their email will be compared against all SSO domains. If an SSO domain matches, they will be added as a Member to that Organization. SSO domains must be globally unique on the server. That is, two Organizations cannot have the same SSO domain.