diff --git a/models/usuario.py b/models/usuario.py
index 9243076..96e50ba 100644
--- a/models/usuario.py
+++ b/models/usuario.py
@@ -51,3 +51,9 @@ def is_anonymous(self):
 
     def get_id(self):
         return str(self.id)  
+    
+    @staticmethod
+    def listar_json():
+        return [usuario.serialize() for usuario in Usuario.listar()]
+    
+    
diff --git a/models/vehiculo.py b/models/vehiculo.py
index be758eb..c542d01 100644
--- a/models/vehiculo.py
+++ b/models/vehiculo.py
@@ -23,7 +23,7 @@ def serialize(self):
             'matricula': self.matricula,
             'id_traccar': self.id_traccar,
             'estado': self.estado,
-            'kilometraje': self.kilometraje
+            'kilometraje': self.kilometraje,
         }
 
     @staticmethod