Implement redirect path for saml

Signed-off-by: Émile Ré <emile@getprobo.com>

pkg/iam/session_service.go

@@ -490,6 +490,7 @@ func (s SessionService) AssumeOrganizationSession(
 	ctx context.Context,
 	sessionID gid.GID,
 	organizationID gid.GID,
+	redirectPath string,
 ) (*coredata.Session, *coredata.Membership, error) {
 	var (
 		now          = time.Now()
@@ -558,7 +559,7 @@ func (s SessionService) AssumeOrganizationSession(
 
 			if err == nil && samlConfig.EnforcementPolicy == coredata.SAMLEnforcementPolicyRequired {
 				if rootSession.AuthMethod != coredata.AuthMethodSAML {
-					redirectURL, err := s.SAMLService.InitiateLogin(ctx, samlConfig.ID)
+					redirectURL, err := s.SAMLService.InitiateLogin(ctx, samlConfig.ID, redirectPath)
 					if err != nil {
 						return fmt.Errorf("cannot initiate SAML login: %w", err)
 					}