allow using targetOrgId parameter to set organisation ID for a request (#41561)

pkg/services/contexthandler/contexthandler.go

@@ -105,6 +105,10 @@ func (h *ContextHandler) Middleware(mContext *web.Context) {
 		}
 	}
 
+	if targetOrgId := reqContext.QueryInt64("targetOrgId"); targetOrgId != 0 {
+		orgID = targetOrgId
+	}
+
 	// the order in which these are tested are important
 	// look for api key in Authorization header first
 	// then init session and look for userId in session