Prevent Users from Joining Multiple Organizations

[sandT]

In my auth0 I have multiple organizations and users specifics to each of the organizations. The issue is that I would like to prevent a user to be added in an organization if he is already part of another organization.
Is there a rule that can resolve this issue or something that can be added in the user metadata?
I have the following rule but it is not working:

function preventMultipleOrgs(user, context, callback) {
  // TODO: implement your rule
  const namespace = 'https://yourdomain.com/';
  const orgId = context.organization.id;

  // Skip this rule if no organization is provided
  if (!orgId) {
    return callback(null, user, context);
  }

  // Fetch the user's current organizations
    const ManagementClient = require('auth0').ManagementClient;
    const management = new ManagementClient({
    token: auth0.accessToken,
    domain: auth0.domain
  });

  management.users.getUserOrganizations({ id: user.user_id })
    .then(organizations => {
      // Check if the user is already a member of another organization
      const hasOtherOrg = organizations.some(org => org.id !== orgId);

      if (hasOtherOrg) {
        // Prevent the user from joining a new organization
        console.log('User is already a member of another organization.');
      } else {
        // Allow the user to join the organization
        return callback(null, user, context);
      }
    })
    .catch(err => callback(new Error('Error fetching user organizations.')));
}

Is there something I am doing wrong?

[tyf]

Hey there @sandT!

@sandT

In my auth0 I have multiple organizations and users specifics to each of the organizations. The issue is that I would like to prevent a user to be added in an organization if he is already part of another organization.

Out of curiosity, how is a theoretical user that is to be blocked by this code being added to an organization?