diff --git a/app/graphql/api/v2/stored_query.rb b/app/graphql/api/v2/stored_query.rb
index ff22fa75b..2ad9d408b 100644
--- a/app/graphql/api/v2/stored_query.rb
+++ b/app/graphql/api/v2/stored_query.rb
@@ -263,6 +263,7 @@ class API::V2::StoredQuery
     usager {
       email
     }
+    connectionUsager
     groupeInstructeur {
       ...GroupeInstructeurFragment
     }
diff --git a/app/graphql/schema.graphql b/app/graphql/schema.graphql
index ad44d1648..7ecc93333 100644
--- a/app/graphql/schema.graphql
+++ b/app/graphql/schema.graphql
@@ -462,6 +462,23 @@ type CommuneChampDescriptor implements ChampDescriptor {
   type: TypeDeChamp! @deprecated(reason: "Utilisez le champ `__typename` à la place.")
 }
 
+enum ConnectionUsager {
+  """
+  Compte supprimé
+  """
+  deleted
+
+  """
+  Connexion via FranceConnect
+  """
+  france_connect
+
+  """
+  Connexion via mot de passe
+  """
+  password
+}
+
 """
 GeoJSON coordinates
 """
@@ -1199,6 +1216,7 @@ type Dossier {
   attestation: File
   avis(id: ID): [Avis!]!
   champs(id: ID): [Champ!]!
+  connectionUsager: ConnectionUsager!
 
   """
   Date de dépôt.
diff --git a/app/graphql/types/dossier_type.rb b/app/graphql/types/dossier_type.rb
index 0dc34f2c1..2a5f70381 100644
--- a/app/graphql/types/dossier_type.rb
+++ b/app/graphql/types/dossier_type.rb
@@ -6,6 +6,12 @@ module Types
       end
     end
 
+    class ConnectionUsager < Types::BaseEnum
+      value(:france_connect, "Connexion via FranceConnect", value: :france_connect)
+      value(:password, "Connexion via mot de passe", value: :password)
+      value(:deleted, "Compte supprimé", value: :deleted)
+    end
+
     description "Un dossier"
 
     global_id_field :id
@@ -26,6 +32,8 @@ module Types
 
     field :archived, Boolean, null: false
 
+    field :connection_usager, ConnectionUsager, null: false
+
     field :motivation, String, null: true
     field :motivation_attachment, Types::File, null: true, extensions: [
       { Extensions::Attachment => { attachment: :justificatif_motivation } }
@@ -67,11 +75,25 @@ module Types
       end
     end
 
+    def connection_usager
+      if object.user_deleted?
+        :deleted
+      else
+        user_loader.then do |user|
+          if user.france_connect_information.present?
+            :france_connect
+          else
+            :password
+          end
+        end
+      end
+    end
+
     def usager
       if object.user_deleted?
         { email: object.user_email_for(:display), id: '<deleted>' }
       else
-        Loaders::Record.for(User).load(object.user_id)
+        user_loader
       end
     end
 
@@ -173,5 +195,11 @@ module Types
     def self.authorized?(object, context)
       context.authorized_demarche?(object.revision.procedure)
     end
+
+    private
+
+    def user_loader
+      Loaders::Record.for(User, includes: :france_connect_information).load(object.user_id)
+    end
   end
 end
diff --git a/spec/controllers/api/v2/graphql_controller_stored_queries_spec.rb b/spec/controllers/api/v2/graphql_controller_stored_queries_spec.rb
index 09555bf12..fb1a40b7d 100644
--- a/spec/controllers/api/v2/graphql_controller_stored_queries_spec.rb
+++ b/spec/controllers/api/v2/graphql_controller_stored_queries_spec.rb
@@ -83,6 +83,7 @@ describe API::V2::GraphqlController do
       it {
         expect(gql_errors).to be_nil
         expect(gql_data[:dossier][:id]).to eq(dossier.to_typed_id)
+        expect(gql_data[:dossier][:connectionUsager]).to eq('password')
         expect(gql_data[:dossier][:demandeur][:__typename]).to eq('PersonnePhysique')
         expect(gql_data[:dossier][:demandeur][:nom]).to eq(dossier.individual.nom)
         expect(gql_data[:dossier][:demandeur][:prenom]).to eq(dossier.individual.prenom)