feat(trial-user-limits): implement trial member limit checks in project and team controllers

- Added TRIAL_MEMBER_LIMIT constant to enforce a maximum number of trial users in project and team member controllers.
- Implemented logic to check current trial members against the limit during user addition, providing appropriate responses for exceeding limits.
- Updated relevant controllers to utilize the new trial member limit functionality, enhancing subscription management for trial users.
- Enhanced error messaging to guide users on upgrading their subscription for additional members.

worklenz-backend/src/controllers/project-members-controller.ts

@@ -9,7 +9,7 @@ import {getColor} from "../shared/utils";
 import TeamMembersController from "./team-members-controller";
 import {checkTeamSubscriptionStatus} from "../shared/paddle-utils";
 import {updateUsers} from "../shared/paddle-requests";
-import {statusExclude} from "../shared/constants";
+import {statusExclude, TRIAL_MEMBER_LIMIT} from "../shared/constants";
 import {NotificationsService} from "../services/notifications/notifications.service";
 
 export default class ProjectMembersController extends WorklenzControllerBase {
@@ -118,6 +118,17 @@ export default class ProjectMembersController extends WorklenzControllerBase {
       return res.status(200).send(new ServerResponse(false, null, "Maximum number of life time users reached."));
     }
 
+    /**
+   * Checks trial user team member limit
+   */
+    if (subscriptionData.subscription_status === "trialing") {
+      const currentTrialMembers = parseInt(subscriptionData.current_count) || 0;
+      
+      if (currentTrialMembers + 1 > TRIAL_MEMBER_LIMIT) {
+        return res.status(200).send(new ServerResponse(false, null, `Trial users cannot exceed ${TRIAL_MEMBER_LIMIT} team members. Please upgrade to add more members.`));
+      }
+    }
+
     // if (subscriptionData.status === "trialing") break;
     if (!userExists && !subscriptionData.is_credit && !subscriptionData.is_custom && subscriptionData.subscription_status !== "trialing") {
       // if (subscriptionData.subscription_status === "active") {