feat: restrict login to specific org by id (scope) (#4294)

* feat: add new org scope

* change default of UserLoginMustBeDomain to false

* return resource owner claims

* fix: use email style for first user

* fix: ensure email style for default users (backwards compatibility)

* change to external domain (as it was before UserLoginMustBeDomain change)

* update e2e tests to use email style usernames

* document new scope

* lint e2e

Co-authored-by: Fabi <38692350+hifabienne@users.noreply.github.com>

internal/domain/auth_request.go

@@ -37,6 +37,7 @@ type AuthRequest struct {
 	RequestedOrgID           string
 	RequestedOrgName         string
 	RequestedPrimaryDomain   string
+	RequestedOrgDomain       bool
 	ApplicationResourceOwner string
 	PrivateLabelingSetting   PrivateLabelingSetting
 	SelectedIDPConfigID      string
@@ -164,3 +165,15 @@ func (a *AuthRequest) GetScopeOrgPrimaryDomain() string {
 	}
 	return ""
 }
+
+func (a *AuthRequest) GetScopeOrgID() string {
+	switch request := a.Request.(type) {
+	case *AuthRequestOIDC:
+		for _, scope := range request.Scopes {
+			if strings.HasPrefix(scope, OrgIDScope) {
+				return strings.TrimPrefix(scope, OrgIDScope)
+			}
+		}
+	}
+	return ""
+}