diff --git a/Backend/src/FlowTasks.API/Program.cs b/Backend/src/FlowTasks.API/Program.cs
index f66bfe0..a290b5b 100644
--- a/Backend/src/FlowTasks.API/Program.cs
+++ b/Backend/src/FlowTasks.API/Program.cs
@@ -88,9 +88,13 @@
     .AddDbContextCheck<ApplicationDbContext>(name: "ApplicationDbContext Check");
 
 // JWT Authentication
-var jwtKey = builder.Configuration["JwtKey"] ?? throw new InvalidOperationException("JWT Key not configured");
-var jwtIssuer = builder.Configuration["Jwt:Issuer"] ?? "FlowTasks";
-var jwtAudience = builder.Configuration["Jwt:Audience"] ?? "FlowTasks";
+var jwtKey = builder.Configuration["Jwt:Key"] ?? throw new InvalidOperationException("JWT Key not configured");
+var jwtIssuer = builder.Configuration["Jwt:Issuer"] ?? throw new InvalidOperationException("JWT Issuer not configured");
+var jwtAudience = builder.Configuration["Jwt:Audience"] ?? throw new InvalidOperationException("JWT Audience not configured");
+if (string.IsNullOrWhiteSpace(jwtKey))
+{
+    Log.Error("jwt Key est vide ou manquante dans la configuration !");
+}
 
 builder.Services.AddAuthentication(options =>
 {
@@ -114,6 +118,10 @@
 builder.Services.AddAuthorization();
 
 var UrlFrontend = builder.Configuration["UrlFrontend"];
+if (string.IsNullOrWhiteSpace(UrlFrontend))
+{
+    Log.Error("UrlFrontend est vide ou manquante dans la configuration !");
+}
 // CORS configuration
 builder.Services.AddCors(options =>
 {
diff --git a/Backend/src/FlowTasks.API/appsettings.Development.json b/Backend/src/FlowTasks.API/appsettings.Development.json
index 1047a9a..ebb7850 100644
--- a/Backend/src/FlowTasks.API/appsettings.Development.json
+++ b/Backend/src/FlowTasks.API/appsettings.Development.json
@@ -5,6 +5,15 @@
       "Microsoft.AspNetCore": "Information",
       "Microsoft.EntityFrameworkCore": "Information"
     }
-  }
+  },
+  "ConnectionStrings": {
+    "DefaultConnection": ""
+  },
+  "Jwt": {
+    "Key": "",
+    "Issuer": "FlowTasks",
+    "Audience": "FlowTasks"
+  },
+  "UrlFrontend": ""
 }
 
diff --git a/Backend/src/FlowTasks.API/appsettings.json b/Backend/src/FlowTasks.API/appsettings.json
index be15dc1..4de73c4 100644
--- a/Backend/src/FlowTasks.API/appsettings.json
+++ b/Backend/src/FlowTasks.API/appsettings.json
@@ -14,6 +14,7 @@
     "Key": "",
     "Issuer": "FlowTasks",
     "Audience": "FlowTasks"
-  }
+  },
+  "UrlFrontend" :  ""
 }