FEATURE: API endpoint for inviting an admin

app/controllers/admin/users_controller.rb

@@ -288,6 +288,35 @@ class Admin::UsersController < Admin::AdminController
     render json: success_json
   end
 
+  def invite_admin
+
+    email = params[:email]
+    unless user = User.find_by_email(email)
+      name = params[:name] if params[:name].present?
+      username = params[:username] if params[:username].present?
+
+      user = User.new(email: email)
+      user.password = SecureRandom.hex
+      user.username = UserNameSuggester.suggest(username || name || email)
+      user.name = User.suggest_name(name || username || email)
+    end
+
+    user.active = true
+    user.save!
+    user.grant_admin!
+    user.change_trust_level!(4)
+    user.email_tokens.update_all  confirmed: true
+
+    email_token = user.email_tokens.create(email: user.email)
+    Jobs.enqueue(:user_email,
+                    type: :account_created,
+                    user_id: user.id,
+                    email_token: email_token.token)
+
+    render json: success_json
+
+  end
+
   private
 
     def fetch_user