diff --git a/Core.Thalos.BuildingBlocks/Adapters/UserAdapter.cs b/Core.Thalos.BuildingBlocks/Adapters/UserAdapter.cs
index 684bdc8..e8eea66 100644
--- a/Core.Thalos.BuildingBlocks/Adapters/UserAdapter.cs
+++ b/Core.Thalos.BuildingBlocks/Adapters/UserAdapter.cs
@@ -96,5 +96,13 @@ namespace Core.Thalos.BuildingBlocks
         [BsonRepresentation(BsonType.String)]
         [JsonPropertyName("token")]
         public string? Token { get; set; } = null;
+
+        /// <summary>
+        /// Gets or sets the tenant identifier associated with the user.
+        /// </summary>
+        [BsonElement("tenantId")]
+        [BsonRepresentation(BsonType.ObjectId)]
+        [JsonPropertyName("tenantId")]
+        public string? TenantId { get; set; } = null;
     }
 }