ToolJet/app/controllers/app_users_controller.rb

class AppUsersController < ApplicationController
  def create
    org_user_id = params[:org_user_id]
    app_id = params[:app_id]
    role = params[:role]

    org_user = OrganizationUser.find org_user_id
    app = App.find app_id

    app_user = AppUser.new(
      role: role,
      app: app,
      user_id: org_user.user_id
    )

    authorize app_user

    if app_user.save
      render json: { success: true }
    else
      render json: { message: 'Could not create user' }, status: 500
    end
  end
end