diff --git a/itachallenge-user/src/main/resources/mongodb-init/chech-filter.bat b/itachallenge-user/src/main/resources/mongodb-init/chech-filter.bat
new file mode 100644
index 000000000..25076a165
--- /dev/null
+++ b/itachallenge-user/src/main/resources/mongodb-init/chech-filter.bat
@@ -0,0 +1,25 @@
+@echo off
+echo Beginning of insertion
+
+echo "Inserting first object..."
+mongosh user --eval "db.user_challenge.insertOne({'_id': '2a9bda26-10f2-11ee-be56-0242ac120002', user_id: '2dcacb291-b4aa-4029-8e9b-284c8ca80296', challenge_id: 'dcacb291-b4aa-4029-8e9b-284c8ca80296' })"
+
+
+IF NOT ERRORLEVEL 1 (
+  echo "First object inserted successfully."
+) ELSE (
+  echo "Error occurred while inserting the first object."
+)
+
+echo "Inserting duplicate object..."
+mongosh user --eval "db.user_challenge.insertOne({'_id': '3a9bda26-10f2-11ee-be56-0242ac120002', user_id: '2dcacb291-b4aa-4029-8e9b-284c8ca80296', challenge_id: 'dcacb291-b4aa-4029-8e9b-284c8ca80296' })"
+
+IF ERRORLEVEL 1 (
+  echo "Duplicate object not inserted. Unique index is working."
+) ELSE (
+  echo "Error occurred. Unique index might not be working."
+)
+
+echo Made it
+pause
+exit
\ No newline at end of file
diff --git a/itachallenge-user/src/main/resources/mongodb-init/load-data.bat b/itachallenge-user/src/main/resources/mongodb-init/load-data.bat
new file mode 100644
index 000000000..9ee526b1b
--- /dev/null
+++ b/itachallenge-user/src/main/resources/mongodb-init/load-data.bat
@@ -0,0 +1,10 @@
+@echo off
+echo Beginning of insertion
+
+mongoimport --db=user --collection=user_score --jsonArray --file=user_score.json
+
+echo "Creating unique index in user_score collection"
+mongosh --eval "db.getSiblingDB('user').user_score.createIndex({ user_id: 1, challenge_id: 1 }, { unique: true })"
+
+echo Made it
+exit
\ No newline at end of file
diff --git a/itachallenge-user/src/main/resources/mongodb-init/load-data.sh b/itachallenge-user/src/main/resources/mongodb-init/load-data.sh
new file mode 100644
index 000000000..7b8e53d2d
--- /dev/null
+++ b/itachallenge-user/src/main/resources/mongodb-init/load-data.sh
@@ -0,0 +1,11 @@
+#!/bin/bash
+
+echo "Beginning of insertion"
+
+mongoimport --db=user --collection=user_score --jsonArray --file=user_score.json
+
+echo "Creating unique index in user_score collection"
+mongosh --eval "db.getSiblingDB('user').user_score.createIndex({ user_id: 1, challenge_id: 1 }, { unique: true })"
+
+echo "Made it"
+exit
\ No newline at end of file
diff --git a/itachallenge-user/src/main/resources/mongodb-init/mongo-init.js b/itachallenge-user/src/main/resources/mongodb-init/mongo-init.js
new file mode 100644
index 000000000..7b3f92e48
--- /dev/null
+++ b/itachallenge-user/src/main/resources/mongodb-init/mongo-init.js
@@ -0,0 +1,11 @@
+//create user logged as root User
+db.createUser({
+    user: "admin_user",
+    pwd: "BYBcMJEEWw5egRUo",
+    roles: [
+      { role: "dbUsersOwner", db: "user" }
+    ]
+  });
+
+//create collections
+db.createCollection("users");
\ No newline at end of file
diff --git a/itachallenge-user/src/main/resources/mongodb-test-data/user_score.json b/itachallenge-user/src/main/resources/mongodb-test-data/user_score.json
new file mode 100644
index 000000000..c158cfabd
--- /dev/null
+++ b/itachallenge-user/src/main/resources/mongodb-test-data/user_score.json
@@ -0,0 +1,596 @@
+[
+  {
+    "_id" : {
+      "$uuid" : "a75fa943-6bc9-4e62-b1db-d43d15b149c7"
+    },
+    "user_id": { "$uuid": "442b8e6e-5d57-4d12-9be2-3ff4f26e7d79"},
+    "challenge_id": { "$uuid":"5c1a97e5-1cca-4144-9981-2de1fb73b178"},
+    "language_id": { "$uuid": "09fabe32-7362-4bfb-ac05-b7bf854c6e0f"},
+    "bookmarked": true,
+    "status": 3,
+    "score": 95
+  },
+  {
+    "_id" : {
+      "$uuid" : "956c9dbd-2e85-4d68-a75b-9783d83c7f72"
+    },
+    "user_id": { "$uuid": "442b8e6e-5d57-4d12-9be2-3ff4f26e7d79"},
+    "challenge_id": { "$uuid": "7fc6a737-dc36-4e1b-87f3-120d81c548aa"},
+    "language_id": { "$uuid": "1e047ea2-b787-49e7-acea-d79e92be3909"},
+    "bookmarked": true,
+    "status": 1,
+    "score": 0
+  },
+  {
+    "_id" : {
+      "$uuid" : "1e8f64e2-6d68-4ae1-9425-8102d0ab61d3"
+    },
+    "user_id": { "$uuid": "442b8e6e-5d57-4d12-9be2-3ff4f26e7d79"},
+    "challenge_id": { "$uuid": "866853b8-ae7d-4daf-8c82-5e6f653e0fc1"},
+    "language_id": { "$uuid": "09fabe32-7362-4bfb-ac05-b7bf854c6e0f"},
+    "bookmarked": true,
+    "status": 2,
+    "score": 60
+  },
+  {
+    "_id" : {
+      "$uuid" : "d9275a97-8317-4da7-9b4f-2a54d5a3b2f9"
+    },
+    "user_id": { "$uuid": "442b8e6e-5d57-4d12-9be2-3ff4f26e7d79"},
+    "challenge_id": { "$uuid": "18c323ce-025c-4f21-8152-8e46bc94c690"},
+    "language_id": { "$uuid": "09fabe32-7362-4bfb-ac05-b7bf854c6e0f"},
+    "bookmarked": true,
+    "status": 1,
+    "score": 0
+  },
+  {
+    "_id" : {
+      "$uuid" : "8d30afbd-7c57-438c-9063-7d9d79c12d75"
+    },
+    "user_id": { "$uuid": "442b8e6e-5d57-4d12-9be2-3ff4f26e7d79"},
+    "challenge_id": { "$uuid": "8c47cf24-ccfa-4bac-88d4-e7fbdadea5af"},
+    "language_id": { "$uuid": "09fabe32-7362-4bfb-ac05-b7bf854c6e0f"},
+    "bookmarked": true,
+    "status": 3,
+    "score": 100
+  },
+  {
+    "_id" : {
+      "$uuid" : "47fa6202-61d5-4de8-9fa1-6f5e4d82a4a0"
+    },
+    "user_id": { "$uuid": "442b8e6e-5d57-4d12-9be2-3ff4f26e7d79"},
+    "challenge_id": { "$uuid": "d0a82421-de75-46a5-903e-69e4addf7e75"},
+    "language_id": { "$uuid": "09fabe32-7362-4bfb-ac05-b7bf854c6e0f"},
+    "bookmarked": true,
+    "status": 3,
+    "score": 100
+  },
+  {
+    "_id" : {
+      "$uuid" : "83f4b85c-77d0-4ae5-b0cd-aa5b0e7ac3d0"
+    },
+    "user_id": { "$uuid": "442b8e6e-5d57-4d12-9be2-3ff4f26e7d79"},
+    "challenge_id": { "$uuid": "2cdcb5a8-ef85-41cb-84d4-08e6cdde9b5e"},
+    "language_id": { "$uuid": "09fabe32-7362-4bfb-ac05-b7bf854c6e0f"},
+    "bookmarked": true,
+    "status": 2,
+    "score": 100
+  },
+  {
+    "_id" : {
+      "$uuid" : "61b39223-83d2-4eaa-9382-3c2f3e681fa8"
+    },
+    "user_id": { "$uuid": "442b8e6e-5d57-4d12-9be2-3ff4f26e7d79"},
+    "challenge_id": { "$uuid": "40728c9c-a557-4d12-bf8f-3747d0924197"},
+    "language_id": { "$uuid": "09fabe32-7362-4bfb-ac05-b7bf854c6e0f"},
+    "bookmarked": true,
+    "status": 3,
+    "score": 100
+  },
+  {
+    "_id" : {
+      "$uuid" : "fa74239f-9060-40c5-a08a-68e1a491d9a5"
+    },
+    "user_id": { "$uuid": "442b8e6e-5d57-4d12-9be2-3ff4f26e7d79"},
+    "challenge_id": { "$uuid": "c6656d38-f592-4be2-b256-7c4015333445"},
+    "language_id": { "$uuid": "09fabe32-7362-4bfb-ac05-b7bf854c6e0f"},
+    "bookmarked": true,
+    "status": 3,
+    "score": 95
+  },
+  {
+    "_id" : {
+      "$uuid" : "5cd6fe26-362d-43db-b07c-2a0a7d61f8e0"
+    },
+    "user_id": { "$uuid": "442b8e6e-5d57-4d12-9be2-3ff4f26e7d79"},
+    "challenge_id": { "$uuid": "eb7a15e4-499e-481d-a909-6acc642b0c09"},
+    "language_id": { "$uuid": "09fabe32-7362-4bfb-ac05-b7bf854c6e0f"},
+    "bookmarked": true,
+    "status": 2,
+    "score": 70
+  },
+  {
+    "_id" : {
+      "$uuid" : "53242ff7-9e8a-4b94-aa3b-d9289a02dbad"
+    },
+    "user_id": { "$uuid": "442b8e6e-5d57-4d12-9be2-3ff4f26e7d79"},
+    "challenge_id": { "$uuid": "107f2216-4814-4b6d-ab3d-7ef85ff0eb6a"},
+    "language_id": { "$uuid": "409c9fe8-74de-4db3-81a1-a55280cf92ef"},
+    "bookmarked": true,
+    "status": 2,
+    "score": 80
+  },
+  {
+    "_id" : {
+      "$uuid" : "f83b0e13-5be5-4c85-913e-9d091721f51f"
+    },
+    "user_id": { "$uuid": "442b8e6e-5d57-4d12-9be2-3ff4f26e7d79"},
+    "challenge_id": { "$uuid": "1aeb27aa-7d7d-46c7-b5b8-4a2354966cd0"},
+    "language_id": { "$uuid": "409c9fe8-74de-4db3-81a1-a55280cf92ef"},
+    "bookmarked": true,
+    "status": 2,
+    "score": 40
+  },
+  {
+    "_id" : {
+      "$uuid" : "1a3f6eac-1027-4e6d-9e3b-63be9fc84fc8"
+    },
+    "user_id": { "$uuid": "442b8e6e-5d57-4d12-9be2-3ff4f26e7d79"},
+    "challenge_id": { "$uuid": "462d7617-477d-497f-8bd2-2fa5d897f20f"},
+    "language_id": { "$uuid": "409c9fe8-74de-4db3-81a1-a55280cf92ef"},
+    "bookmarked": true,
+    "status": 2,
+    "score": 50
+  },
+  {
+    "_id" : {
+      "$uuid" : "b2b32a8d-d31d-4d27-98e5-58dc7dd4ffdb"
+    },
+    "user_id": { "$uuid": "442b8e6e-5d57-4d12-9be2-3ff4f26e7d79"},
+    "challenge_id": { "$uuid": "468c70e7-57ea-4fba-b57d-73034ad5aa5f"},
+    "language_id": { "$uuid": "409c9fe8-74de-4db3-81a1-a55280cf92ef"},
+    "bookmarked": true,
+    "status": 2,
+    "score": 90
+  },
+  {
+    "_id" : {
+      "$uuid" : "9a2d29f7-53f8-45dd-a4f6-29bbf76fd6d1"
+    },
+    "user_id": { "$uuid": "b24f6d1a-4f7d-432a-bab0-8949c915ef2f"},
+    "challenge_id": { "$uuid": "5c1a97e5-1cca-4144-9981-2de1fb73b178"},
+    "language_id": { "$uuid": "660e1b18-0c0a-4262-a28a-85de9df6ac5f"},
+    "bookmarked": true,
+    "status": 3,
+    "score": 90
+  },
+  {
+    "_id" : {
+      "$uuid" : "9874c28d-2e4c-44f9-af1d-5cd18a62b4d7"
+    },
+    "user_id": { "$uuid": "b24f6d1a-4f7d-432a-bab0-8949c915ef2f"},
+    "challenge_id": { "$uuid": "a3960f5e-e820-4f8e-9cfd-6e952ae236d7"},
+    "language_id": { "$uuid": "660e1b18-0c0a-4262-a28a-85de9df6ac5f"},
+    "bookmarked": true,
+    "status": 1,
+    "score": 20
+  },
+  {
+    "_id" : {
+      "$uuid" : "c6f2d87e-6b38-4a60-a68f-90ae24b12f53"
+    },
+    "user_id": { "$uuid": "b24f6d1a-4f7d-432a-bab0-8949c915ef2f"},
+    "challenge_id": { "$uuid": "1aeb27aa-7d7d-46c7-b5b8-4a2354966cd0"},
+    "language_id": { "$uuid": "660e1b18-0c0a-4262-a28a-85de9df6ac5f"},
+    "bookmarked": true,
+    "status": 3,
+    "score": 90
+  },
+  {
+    "_id" : {
+      "$uuid" : "e1f8bc03-33c9-4b2d-8d3b-70f7b835d4a6"
+    },
+    "user_id": { "$uuid": "b24f6d1a-4f7d-432a-bab0-8949c915ef2f"},
+    "challenge_id": { "$uuid": "18c323ce-025c-4f21-8152-8e46bc94c690"},
+    "language_id": { "$uuid": "660e1b18-0c0a-4262-a28a-85de9df6ac5f"},
+    "bookmarked": true,
+    "status": 1,
+    "score": 0
+  },
+  {
+    "_id" : {
+      "$uuid" : "753b56a9-af30-4e23-ae9a-879e22519629"
+    },
+    "user_id": { "$uuid": "b24f6d1a-4f7d-432a-bab0-8949c915ef2f"},
+    "challenge_id": { "$uuid": "4345bf25-9dbe-429f-80e5-42e68b2f8a85"},
+    "language_id": { "$uuid": "660e1b18-0c0a-4262-a28a-85de9df6ac5f"},
+    "bookmarked": true,
+    "status": 1,
+    "score": 0
+  },
+  {
+    "_id" : {
+      "$uuid" : "84f2d9bc-ec56-4a43-8c6d-317d78d4377e"
+    },
+    "user_id": { "$uuid": "b24f6d1a-4f7d-432a-bab0-8949c915ef2f"},
+    "challenge_id": { "$uuid": "d0a82421-de75-46a5-903e-69e4addf7e75"},
+    "language_id": { "$uuid": "660e1b18-0c0a-4262-a28a-85de9df6ac5f"},
+    "bookmarked": true,
+    "status": 3,
+    "score": 95
+  },
+  {
+    "_id" : {
+      "$uuid" : "9e107c77-6ff3-4c0b-8ef9-0d53b5987a52"
+    },
+    "user_id": { "$uuid": "b24f6d1a-4f7d-432a-bab0-8949c915ef2f"},
+    "challenge_id": { "$uuid": "b3c3ddb5-dc3e-4659-9f11-fca3f18f49f4"},
+    "language_id": { "$uuid": "660e1b18-0c0a-4262-a28a-85de9df6ac5f"},
+    "bookmarked": true,
+    "status": 1,
+    "score": 10
+  },
+  {
+    "_id" : {
+      "$uuid" : "d05f0d7a-ccf3-4e3a-b03f-3a0fe9976eef"
+    },
+    "user_id": { "$uuid": "b24f6d1a-4f7d-432a-bab0-8949c915ef2f"},
+    "challenge_id": { "$uuid": "577f459b-a1f9-4905-a689-a060677d393d"},
+    "language_id": { "$uuid": "660e1b18-0c0a-4262-a28a-85de9df6ac5f"},
+    "bookmarked": true,
+    "status": 3,
+    "score": 90
+  },
+  {
+    "_id" : {
+      "$uuid" : "521de0a8-8773-484c-b70d-33c7c4b7d532"
+    },
+    "user_id": { "$uuid": "b24f6d1a-4f7d-432a-bab0-8949c915ef2f"},
+    "challenge_id": { "$uuid": "eb7a15e4-499e-481d-a909-6acc642b0c09"},
+    "language_id": { "$uuid": "660e1b18-0c0a-4262-a28a-85de9df6ac5f"},
+    "bookmarked": true,
+    "status": 2,
+    "score": 60
+  },
+  {
+    "_id" : {
+      "$uuid" : "4f93e3dc-06e5-4b11-9f9b-94f3f5c5e129"
+    },
+    "user_id": { "$uuid": "b24f6d1a-4f7d-432a-bab0-8949c915ef2f"},
+    "challenge_id": { "$uuid": "c0c7510b-f867-4375-b46f-0c164f30429f"},
+    "language_id": { "$uuid": "1e047ea2-b787-49e7-acea-d79e92be3909"},
+    "bookmarked": true,
+    "status": 1,
+    "score": 10
+  },
+  {
+    "_id" : {
+      "$uuid" : "a3a6239e-4d0f-4923-a4b2-75fd5e202168"
+    },
+    "user_id": { "$uuid": "b24f6d1a-4f7d-432a-bab0-8949c915ef2f"},
+    "challenge_id": { "$uuid": "dcacb291-b4aa-4029-8e9b-284c8ca80296"},
+    "language_id": { "$uuid": "1e047ea2-b787-49e7-acea-d79e92be3909"},
+    "bookmarked": true,
+    "status": 2,
+    "score": 60
+  },
+  {
+    "_id" : {
+      "$uuid" : "6d8c7b92-04a5-4de7-8246-3d740d150402"
+    },
+    "user_id": { "$uuid": "b24f6d1a-4f7d-432a-bab0-8949c915ef2f"},
+    "challenge_id": { "$uuid": "5f71e51d-1e3e-44a2-bc97-158021f1a344"},
+    "language_id": { "$uuid": "1e047ea2-b787-49e7-acea-d79e92be3909"},
+    "bookmarked": true,
+    "status": 2,
+    "score": 15
+  },
+  {
+    "_id" : {
+      "$uuid" : "bce0ed97-c9da-4f5a-bfd1-5934c2a03c5e"
+    },
+    "user_id": { "$uuid": "b24f6d1a-4f7d-432a-bab0-8949c915ef2f"},
+    "challenge_id": { "$uuid": "4ca047df-326e-4e56-affa-5541f63ab0af"},
+    "language_id": { "$uuid": "1e047ea2-b787-49e7-acea-d79e92be3909"},
+    "bookmarked": true,
+    "status": 2,
+    "score": 25
+  },
+  {
+    "_id" : {
+      "$uuid" : "28882aa5-8e14-4a23-b3fc-6e2c171b615b"
+    },
+    "user_id": { "$uuid": "b24f6d1a-4f7d-432a-bab0-8949c915ef2f"},
+    "challenge_id": { "$uuid": "6646a97f-17a7-49d6-b325-6db9e84a456f"},
+    "language_id": { "$uuid": "1e047ea2-b787-49e7-acea-d79e92be3909"},
+    "bookmarked": true,
+    "status": 3,
+    "score": 95
+  },
+  {
+    "_id" : {
+      "$uuid" : "d1e3fd63-41c7-49c1-8d3d-7f19d276fb24"
+    },
+    "user_id": { "$uuid": "b24f6d1a-4f7d-432a-bab0-8949c915ef2f"},
+    "challenge_id": { "$uuid": "ea9a9b70-273c-4322-acc4-ac4950558a4a"},
+    "language_id": { "$uuid": "1e047ea2-b787-49e7-acea-d79e92be3909"},
+    "bookmarked": true,
+    "status": 1,
+    "score": 0
+  },
+  {
+    "_id" : {
+      "$uuid" : "c52153d4-ae39-4b34-a1c3-8d1d0c9e9c3f"
+    },
+    "user_id": { "$uuid": "ef43e8a5-558d-4f59-aa86-5e3273c12c9a"},
+    "challenge_id": { "$uuid": "a3960f5e-e820-4f8e-9cfd-6e952ae236d7"},
+    "language_id": { "$uuid": "1e047ea2-b787-49e7-acea-d79e92be3909"},
+    "bookmarked": true,
+    "status": 1,
+    "score": 0
+  },
+  {
+    "_id" : {
+      "$uuid" : "9bfa7f81-48fd-4219-8d18-8d7308b0a979"
+    },
+    "user_id": { "$uuid": "ef43e8a5-558d-4f59-aa86-5e3273c12c9a"},
+    "challenge_id": { "$uuid": "1aeb27aa-7d7d-46c7-b5b8-4a2354966cd0"},
+    "language_id": { "$uuid": "1e047ea2-b787-49e7-acea-d79e92be3909"},
+    "bookmarked": true,
+    "status": 1,
+    "score": 0
+  },
+  {
+    "_id" : {
+      "$uuid" : "3e4a2998-7a75-4e94-8e5d-90708b5ef993"
+    },
+    "user_id": { "$uuid": "ef43e8a5-558d-4f59-aa86-5e3273c12c9a"},
+    "challenge_id": { "$uuid": "d2ce221e-cb49-42d6-b43b-b66eba4ca52d"},
+    "language_id": { "$uuid": "1e047ea2-b787-49e7-acea-d79e92be3909"},
+    "bookmarked": true,
+    "status": 1,
+    "score": 0
+  },
+  {
+    "_id" : {
+      "$uuid" : "f2c648f5-5f5e-44d7-a5a3-dc7520c915f7"
+    },
+    "user_id": { "$uuid": "ef43e8a5-558d-4f59-aa86-5e3273c12c9a"},
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+]
\ No newline at end of file