create customer service auth

app/controllers/application_controller.rb

@@ -6,19 +6,35 @@ class ApplicationController < ActionController::API
   attr_reader :current_user
 
   def authenticate
-    return user_invalid! unless authorization_header
+    if authorization_header
+      authenticate_user
+    elsif customer_service_auth_key
+      authenticate_customer_service
+    else
+      user_invalid!
+    end
+  end
+
+  private
 
+  def authenticate_user
     user = User.find_or_initialize_by({
                                         email: user_auth_params['email'],
                                         google_id: user_auth_params['google_id']
                                       })
     return user_invalid! unless user.valid?
 
     save_user!(user)
-
     @current_user = user
   end
 
+  def authenticate_customer_service
+    customer_service_auth = CustomerServiceAuth.find_by(auth_key: customer_service_auth_key)
+    return user_invalid! unless customer_service_auth
+
+    @current_user = customer_service_auth.customer
+  end
+
   def save_user!(user)
     if user.new_record?
       user.first_name = user_auth_params['first_name']
@@ -45,6 +61,10 @@ def authorization_header
     request.headers['Authorization']
   end
 
+  def customer_service_auth_key
+    request.headers['Customer-Service-Auth-Key']
+  end
+
   def user_auth_params
     return @user_auth_params if @user_auth_params