diff --git a/.env.example b/.env.example
new file mode 100644
index 0000000..1eb1395
--- /dev/null
+++ b/.env.example
@@ -0,0 +1,4 @@
+DATABASE_URL=
+
+MYSQL_DATABASE=
+MYSQL_ROOT_PASSWORD=
\ No newline at end of file
diff --git a/package.json b/package.json
index b104de5..550b75f 100644
--- a/package.json
+++ b/package.json
@@ -23,6 +23,7 @@
     "@nestjs/common": "^11.0.1",
     "@nestjs/core": "^11.0.1",
     "@nestjs/platform-express": "^11.0.1",
+    "@prisma/client": "^6.3.1",
     "prisma": "^6.3.1",
     "reflect-metadata": "^0.2.2",
     "rxjs": "^7.8.1"
diff --git a/prisma/migrations/20250205172850_/migration.sql b/prisma/migrations/20250205172850_/migration.sql
new file mode 100644
index 0000000..188c572
--- /dev/null
+++ b/prisma/migrations/20250205172850_/migration.sql
@@ -0,0 +1,16 @@
+-- CreateTable
+CREATE TABLE "User" (
+    "id" SERIAL NOT NULL,
+    "worldId" TEXT NOT NULL,
+    "username" TEXT NOT NULL,
+    "name" TEXT NOT NULL,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+
+    CONSTRAINT "User_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateIndex
+CREATE UNIQUE INDEX "User_worldId_key" ON "User"("worldId");
+
+-- CreateIndex
+CREATE UNIQUE INDEX "User_username_key" ON "User"("username");
diff --git a/prisma/migrations/20250205180025_user_entity/migration.sql b/prisma/migrations/20250205180025_user_entity/migration.sql
new file mode 100644
index 0000000..7c36730
--- /dev/null
+++ b/prisma/migrations/20250205180025_user_entity/migration.sql
@@ -0,0 +1,10 @@
+/*
+  Warnings:
+
+  - You are about to drop the column `name` on the `User` table. All the data in the column will be lost.
+
+*/
+-- AlterTable
+ALTER TABLE "User" DROP COLUMN "name",
+ADD COLUMN     "pollsCreatedCount" INTEGER NOT NULL DEFAULT 0,
+ADD COLUMN     "profilePicture" TEXT;
diff --git a/prisma/migrations/20250205193050_initail_entities/migration.sql b/prisma/migrations/20250205193050_initail_entities/migration.sql
new file mode 100644
index 0000000..a3a7399
--- /dev/null
+++ b/prisma/migrations/20250205193050_initail_entities/migration.sql
@@ -0,0 +1,68 @@
+-- CreateTable
+CREATE TABLE "Poll" (
+    "id" SERIAL NOT NULL,
+    "userId" INTEGER NOT NULL,
+    "title" TEXT NOT NULL,
+    "description" TEXT,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "startDate" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "endDate" TIMESTAMP(3) NOT NULL,
+    "isAnonymous" BOOLEAN NOT NULL DEFAULT false,
+
+    CONSTRAINT "Poll_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateTable
+CREATE TABLE "Option" (
+    "id" SERIAL NOT NULL,
+    "optionText" TEXT NOT NULL,
+    "pollId" INTEGER NOT NULL,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+
+    CONSTRAINT "Option_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateTable
+CREATE TABLE "Tag" (
+    "id" SERIAL NOT NULL,
+    "content" TEXT,
+
+    CONSTRAINT "Tag_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateTable
+CREATE TABLE "Vote" (
+    "id" SERIAL NOT NULL,
+    "weight" INTEGER NOT NULL,
+    "optionId" INTEGER NOT NULL,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "proof" TEXT[],
+
+    CONSTRAINT "Vote_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateTable
+CREATE TABLE "_PollToTag" (
+    "A" INTEGER NOT NULL,
+    "B" INTEGER NOT NULL,
+
+    CONSTRAINT "_PollToTag_AB_pkey" PRIMARY KEY ("A","B")
+);
+
+-- CreateIndex
+CREATE INDEX "_PollToTag_B_index" ON "_PollToTag"("B");
+
+-- AddForeignKey
+ALTER TABLE "Poll" ADD CONSTRAINT "Poll_userId_fkey" FOREIGN KEY ("userId") REFERENCES "User"("id") ON DELETE RESTRICT ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "Option" ADD CONSTRAINT "Option_pollId_fkey" FOREIGN KEY ("pollId") REFERENCES "Poll"("id") ON DELETE RESTRICT ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "Vote" ADD CONSTRAINT "Vote_optionId_fkey" FOREIGN KEY ("optionId") REFERENCES "Option"("id") ON DELETE RESTRICT ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "_PollToTag" ADD CONSTRAINT "_PollToTag_A_fkey" FOREIGN KEY ("A") REFERENCES "Poll"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "_PollToTag" ADD CONSTRAINT "_PollToTag_B_fkey" FOREIGN KEY ("B") REFERENCES "Tag"("id") ON DELETE CASCADE ON UPDATE CASCADE;
diff --git a/prisma/migrations/migration_lock.toml b/prisma/migrations/migration_lock.toml
new file mode 100644
index 0000000..648c57f
--- /dev/null
+++ b/prisma/migrations/migration_lock.toml
@@ -0,0 +1,3 @@
+# Please do not edit this file manually
+# It should be added in your version-control system (e.g., Git)
+provider = "postgresql"
\ No newline at end of file
diff --git a/prisma/schema.prisma b/prisma/schema.prisma
index ee282c7..0cdae82 100644
--- a/prisma/schema.prisma
+++ b/prisma/schema.prisma
@@ -12,3 +12,56 @@ datasource db {
   provider = "postgresql"
   url      = env("DATABASE_URL")
 }
+
+model User{
+  id Int @id @default(autoincrement())
+  worldId String @unique()
+  username String @unique()
+  profilePicture String?
+  pollsCreatedCount Int @default(0)
+  createdAt DateTime @default(now())
+  poll Poll[]
+  
+}
+
+
+model Poll{
+  id Int @id @default(autoincrement())
+  user User @relation(fields: [userId],references: [id])
+  userId  Int 
+  title String 
+  description String?
+  options Option[]
+  tags Tag[]
+  createdAt DateTime @default(now())
+  startDate DateTime @default(now())
+  endDate DateTime
+  isAnonymous Boolean @default(false)
+
+}
+
+model Option {
+  id      Int    @id @default(autoincrement())
+  optionText     String 
+  poll    Poll   @relation(fields: [pollId], references: [id])
+  pollId  Int    
+  votes  Vote[]
+  createdAt  DateTime @default(now())
+}
+
+model Tag{
+  id Int @id @default(autoincrement())
+  content String?
+  poll Poll[]
+
+}
+
+
+model Vote{
+  id Int @id @default(autoincrement())
+  weight Int 
+  option Option @relation(fields: [optionId], references: [id])
+  optionId  Int
+  createdAt DateTime @default(now())
+  proof String[] 
+}
\ No newline at end of file
diff --git a/yarn.lock b/yarn.lock
index e1d15fc..24ccefa 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1063,6 +1063,11 @@
   resolved "https://registry.yarnpkg.com/@pkgr/core/-/core-0.1.1.tgz#1ec17e2edbec25c8306d424ecfbf13c7de1aaa31"
   integrity sha512-cq8o4cWH0ibXh9VGi5P20Tu9XF/0fFXl9EUinr9QfTM7a7p0oTA4iJRCQWppXR1Pg8dSM0UCItCkPwsk9qWWYA==
 
+"@prisma/client@^6.3.1":
+  version "6.3.1"
+  resolved "https://registry.yarnpkg.com/@prisma/client/-/client-6.3.1.tgz#4e4b05b27f4541ea541a601c57a8ada10b526848"
+  integrity sha512-ARAJaPs+eBkemdky/XU3cvGRl+mIPHCN2lCXsl5Vlb0E2gV+R6IN7aCI8CisRGszEZondwIsW9Iz8EJkTdykyA==
+
 "@prisma/debug@6.3.1":
   version "6.3.1"
   resolved "https://registry.yarnpkg.com/@prisma/debug/-/debug-6.3.1.tgz#08730461dab4fe147efa70637952b942dc1961b5"