diff --git a/app/controllers/france_connect/particulier_controller.rb b/app/controllers/france_connect/particulier_controller.rb
index 1f0ee1a05..271bfe89a 100644
--- a/app/controllers/france_connect/particulier_controller.rb
+++ b/app/controllers/france_connect/particulier_controller.rb
@@ -1,16 +1,6 @@
 class FranceConnect::ParticulierController < ApplicationController
   def login
-    client = FranceConnectParticulierClient.new
-
-    session[:state] = SecureRandom.hex(16)
-    session[:nonce] = SecureRandom.hex(16)
-
-    authorization_uri = client.authorization_uri(
-        scope: [:profile, :email],
-        state: session[:state],
-        nonce: session[:nonce]
-    )
-    redirect_to authorization_uri
+    redirect_to FranceConnectService.authorization_uri
   end
 
   def callback
diff --git a/app/services/france_connect_service.rb b/app/services/france_connect_service.rb
index a5ebc6cab..d844fd82a 100644
--- a/app/services/france_connect_service.rb
+++ b/app/services/france_connect_service.rb
@@ -1,4 +1,13 @@
 class FranceConnectService
+  def self.authorization_uri
+    client = FranceConnectParticulierClient.new
+
+    client.authorization_uri(
+      scope: [:profile, :email],
+      state: SecureRandom.hex(16),
+      nonce: SecureRandom.hex(16))
+  end
+
   def self.retrieve_user_informations_particulier code
     client = FranceConnectParticulierClient.new(code)