diff --git a/src/APIMappers/UserMappeur.cs b/src/APIMappers/UserMappeur.cs
index 96d1375..48a8cda 100644
--- a/src/APIMappers/UserMappeur.cs
+++ b/src/APIMappers/UserMappeur.cs
@@ -25,11 +25,8 @@ public static class UserMappeur
             DateOfBirth = user.DateOfBirth,
             IsCoach = user.Role is Coach
         });
-        // ), (activity, entity) => activity.Id = entity.IdActivity);
      
     }
-    // ochestrateur  => api gateway
-    // corégraphie => microservice TCP
     
 
     public static User ToModel(this UserDto userDto)
diff --git a/src/Dto/ActivityDto.cs b/src/Dto/ActivityDto.cs
index b2a0a91..fcb108c 100644
--- a/src/Dto/ActivityDto.cs
+++ b/src/Dto/ActivityDto.cs
@@ -3,7 +3,7 @@ namespace Dto;
 public class ActivityDto
 {
     public int Id { get; set; }
-    public string Type { get; set; }
+    public string? Type { get; set; }
     public DateTime Date { get; set; }
     public DateTime StartTime { get; set; }
     public DateTime EndTime { get; set; }
diff --git a/src/Dto/ActivityFitFileDto.cs b/src/Dto/ActivityFitFileDto.cs
index eb8fec0..f68fbd1 100644
--- a/src/Dto/ActivityFitFileDto.cs
+++ b/src/Dto/ActivityFitFileDto.cs
@@ -2,6 +2,13 @@ namespace Dto;
 
 public class ActivityFitFileDto
 {
+    public ActivityFitFileDto(string activityName, string activityType, int effortFeel)
+    {
+        ActivityName = activityName;
+        ActivityType = activityType;
+        EffortFeel = effortFeel;
+    }
+
     public string ActivityName { get; set; }
     public string ActivityType { get; set; }
     public int EffortFeel { get; set; }
diff --git a/src/Entities/ActivityEntity.cs b/src/Entities/ActivityEntity.cs
index ab26369..5dc7761 100644
--- a/src/Entities/ActivityEntity.cs
+++ b/src/Entities/ActivityEntity.cs
@@ -29,7 +29,7 @@ namespace Entities
         /// </summary>
         [Required]
         [MaxLength(100)]
-        public string  Type { get; set; } = null!;
+        public string?  Type { get; set; } = null!;
 
         /// <summary>
         /// Gets or sets the date of the activity.
diff --git a/src/HeartTrackAPI/AppBootstrap.cs b/src/HeartTrackAPI/AppBootstrap.cs
index 2faf1bf..927750c 100644
--- a/src/HeartTrackAPI/AppBootstrap.cs
+++ b/src/HeartTrackAPI/AppBootstrap.cs
@@ -67,6 +67,12 @@ public class AppBootstrap(IConfiguration configuration)
                 if (string.IsNullOrWhiteSpace(connectionString))
                 {
                     services.AddDbContext<AuthDbContext>(options => options.UseInMemoryDatabase("AuthDb"));
+                    Console.WriteLine("InMemoryDatabase");
+                    Console.WriteLine("InMemoryDatabase");
+                    Console.WriteLine("InMemoryDatabase");
+                    Console.WriteLine("InMemoryDatabase");
+                    Console.WriteLine("InMemoryDatabase");
+
                     //options => options.UseSqlite(connectionString)
                     //services.AddDbContext<HeartTrackContext>();
                     services.AddDbContext<HeartTrackContext>(options =>
diff --git a/src/Model/Activity.cs b/src/Model/Activity.cs
index 11457c1..cef25b7 100644
--- a/src/Model/Activity.cs
+++ b/src/Model/Activity.cs
@@ -4,7 +4,7 @@ namespace Model;
 public class Activity
     {
         public int Id { get; set; }
-        public string Type { get; set; }
+        public string? Type { get; set; }
         public DateTime Date { get; set; }
         public DateTime StartTime { get; set; }
         public DateTime EndTime { get; set; }
@@ -33,7 +33,7 @@ public class Activity
         public bool HasAutoPause { get; set; }
         
         public HashSet<User> Users { get; private set; } = new HashSet<User>();
-        public Activity(int idActivity ,string type, DateTime date, DateTime startTime, DateTime endTime,
+        public Activity(int idActivity ,string? type, DateTime date, DateTime startTime, DateTime endTime,
                         int effort, float variability, float variance, float standardDeviation,
                         float average, int maximum, int minimum, float averageTemperature, bool hasAutoPause)
         {