diff --git a/src/app/build.gradle b/src/app/build.gradle
index dcd6d53..ba6efaa 100644
--- a/src/app/build.gradle
+++ b/src/app/build.gradle
@@ -1,6 +1,8 @@
 plugins {
     id 'com.android.application'
     id 'org.jetbrains.kotlin.android'
+    id "kotlin-kapt"
+    id "dagger.hilt.android.plugin"
 }
 
 android {
@@ -66,5 +68,10 @@ dependencies {
     debugImplementation "androidx.compose.ui:ui-test-manifest:$compose_version"
     implementation("androidx.core:core-splashscreen:1.0.1")
 
+    //Hilt
+    implementation "com.google.dagger:hilt-android:$hilt_version"
+    kapt "com.google.dagger:hilt-android-compiler:$hilt_version"
+    implementation "androidx.hilt:hilt-navigation-compose:1.0.0"
+
     implementation 'com.github.racra:smooth-corner-rect-android-compose:v1.0.0'
 }
diff --git a/src/app/src/main/AndroidManifest.xml b/src/app/src/main/AndroidManifest.xml
index 207fd85..b5080f8 100644
--- a/src/app/src/main/AndroidManifest.xml
+++ b/src/app/src/main/AndroidManifest.xml
@@ -3,6 +3,7 @@
     xmlns:tools="http://schemas.android.com/tools">
 
     <application
+        android:name=".AllInApplication"
         android:allowBackup="true"
         android:dataExtractionRules="@xml/data_extraction_rules"
         android:fullBackupContent="@xml/backup_rules"
@@ -12,7 +13,7 @@
         android:theme="@style/Theme.Allin"
         tools:targetApi="31">
         <activity
-            android:name=".MainActivity"
+            android:name=".ui.MainActivity"
             android:exported="true"
             android:theme="@style/Theme.Allin">
             <intent-filter>
diff --git a/src/app/src/main/java/fr/iut/alldev/allin/AllInApplication.kt b/src/app/src/main/java/fr/iut/alldev/allin/AllInApplication.kt
new file mode 100644
index 0000000..b45771b
--- /dev/null
+++ b/src/app/src/main/java/fr/iut/alldev/allin/AllInApplication.kt
@@ -0,0 +1,7 @@
+package fr.iut.alldev.allin
+
+import android.app.Application
+import dagger.hilt.android.HiltAndroidApp
+
+@HiltAndroidApp
+class AllInApplication : Application()
\ No newline at end of file
diff --git a/src/app/src/main/java/fr/iut/alldev/allin/MainActivity.kt b/src/app/src/main/java/fr/iut/alldev/allin/ui/MainActivity.kt
similarity index 94%
rename from src/app/src/main/java/fr/iut/alldev/allin/MainActivity.kt
rename to src/app/src/main/java/fr/iut/alldev/allin/ui/MainActivity.kt
index 462e0f0..ef2e42a 100644
--- a/src/app/src/main/java/fr/iut/alldev/allin/MainActivity.kt
+++ b/src/app/src/main/java/fr/iut/alldev/allin/ui/MainActivity.kt
@@ -1,4 +1,4 @@
-package fr.iut.alldev.allin
+package fr.iut.alldev.allin.ui
 
 import android.app.Activity
 import android.os.Build
@@ -11,9 +11,11 @@ import androidx.compose.ui.graphics.toArgb
 import androidx.compose.ui.platform.LocalView
 import androidx.core.view.WindowCompat
 import androidx.core.view.WindowInsetsCompat
+import dagger.hilt.android.AndroidEntryPoint
 import fr.iut.alldev.allin.ui.navigation.AllInNavHost
 import fr.iut.alldev.allin.ui.theme.AllInTheme
 
+@AndroidEntryPoint
 class MainActivity : ComponentActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
diff --git a/src/app/src/main/java/fr/iut/alldev/allin/ui/login/LoginScreen.kt b/src/app/src/main/java/fr/iut/alldev/allin/ui/login/LoginScreen.kt
index d5fc0d7..6bc4eeb 100644
--- a/src/app/src/main/java/fr/iut/alldev/allin/ui/login/LoginScreen.kt
+++ b/src/app/src/main/java/fr/iut/alldev/allin/ui/login/LoginScreen.kt
@@ -14,6 +14,7 @@ import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
+import androidx.hilt.navigation.compose.hiltViewModel
 import fr.iut.alldev.allin.R
 import fr.iut.alldev.allin.ui.core.AllInGradientButton
 import fr.iut.alldev.allin.ui.core.AllInPasswordField
@@ -24,7 +25,8 @@ import fr.iut.alldev.allin.ui.theme.AllInTheme
 @Composable
 fun LoginScreen(
     onClickLogin: ()->Unit,
-    onClickRegister: ()->Unit
+    onClickRegister: ()->Unit,
+    loginViewModel: LoginViewModel = hiltViewModel()
 ) {
 
     val bringIntoViewRequester = BringIntoViewRequester()
diff --git a/src/app/src/main/java/fr/iut/alldev/allin/ui/login/LoginViewModel.kt b/src/app/src/main/java/fr/iut/alldev/allin/ui/login/LoginViewModel.kt
new file mode 100644
index 0000000..149c6de
--- /dev/null
+++ b/src/app/src/main/java/fr/iut/alldev/allin/ui/login/LoginViewModel.kt
@@ -0,0 +1,11 @@
+package fr.iut.alldev.allin.ui.login
+
+import androidx.lifecycle.ViewModel
+import dagger.hilt.android.lifecycle.HiltViewModel
+import javax.inject.Inject
+
+@HiltViewModel
+class LoginViewModel @Inject constructor(
+) : ViewModel() {
+
+}
\ No newline at end of file
diff --git a/src/app/src/main/java/fr/iut/alldev/allin/ui/register/RegisterScreen.kt b/src/app/src/main/java/fr/iut/alldev/allin/ui/register/RegisterScreen.kt
index 89a25df..a20fb8e 100644
--- a/src/app/src/main/java/fr/iut/alldev/allin/ui/register/RegisterScreen.kt
+++ b/src/app/src/main/java/fr/iut/alldev/allin/ui/register/RegisterScreen.kt
@@ -16,6 +16,7 @@ import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
+import androidx.hilt.navigation.compose.hiltViewModel
 import fr.iut.alldev.allin.R
 import fr.iut.alldev.allin.ui.core.AllInGradientButton
 import fr.iut.alldev.allin.ui.core.AllInPasswordField
@@ -25,12 +26,15 @@ import fr.iut.alldev.allin.ui.theme.AllInTheme
 @OptIn(ExperimentalFoundationApi::class)
 @Composable
 fun RegisterScreen(
-    onClickRegister: ()->Unit,
-    onClickLogin: ()->Unit
+    onClickRegister: () -> Unit,
+    onClickLogin: () -> Unit,
+    registerViewModel: RegisterViewModel = hiltViewModel(),
 ) {
-    var username by remember{
-        mutableStateOf("")
-    }
+    val (username, setUsername) = remember{ registerViewModel.username }
+    val (email, setEmail) = remember{ registerViewModel.email }
+    val (password, setPassword) = remember{ registerViewModel.password }
+    val (passwordValidation, setPasswordValidation) = remember{ registerViewModel.passwordValidation }
+
     val bringIntoViewRequester = remember { BringIntoViewRequester() }
 
     Box(
@@ -78,30 +82,30 @@ fun RegisterScreen(
                     modifier = Modifier.fillMaxWidth(),
                     placeholder = stringResource(id = R.string.username),
                     value = username,
-                    onValueChange = { username = it },
+                    onValueChange = setUsername,
                     maxChar = 20,
                     bringIntoViewRequester = bringIntoViewRequester
                 )
                 AllInTextField(
                     modifier = Modifier.fillMaxWidth(),
                     placeholder = stringResource(id = R.string.email),
-                    value = "",
-                    onValueChange = { },
+                    value = email,
+                    onValueChange = setEmail,
                     keyboardType = KeyboardType.Email,
                     bringIntoViewRequester = bringIntoViewRequester
                 )
                 AllInPasswordField(
                     modifier = Modifier.fillMaxWidth(),
                     placeholder = stringResource(id = R.string.password),
-                    value = "",
-                    onValueChange = { },
+                    value = password,
+                    onValueChange = setPassword,
                     bringIntoViewRequester = bringIntoViewRequester
                 )
                 AllInPasswordField(
                     modifier = Modifier.fillMaxWidth(),
                     placeholder = stringResource(id = R.string.confirm_password),
-                    value = "",
-                    onValueChange = { },
+                    value = passwordValidation,
+                    onValueChange = setPasswordValidation,
                     bringIntoViewRequester = bringIntoViewRequester
                 )
             }
diff --git a/src/app/src/main/java/fr/iut/alldev/allin/ui/register/RegisterViewModel.kt b/src/app/src/main/java/fr/iut/alldev/allin/ui/register/RegisterViewModel.kt
new file mode 100644
index 0000000..50cee46
--- /dev/null
+++ b/src/app/src/main/java/fr/iut/alldev/allin/ui/register/RegisterViewModel.kt
@@ -0,0 +1,18 @@
+package fr.iut.alldev.allin.ui.register
+
+import androidx.compose.runtime.mutableStateOf
+import androidx.lifecycle.ViewModel
+import dagger.hilt.android.lifecycle.HiltViewModel
+import fr.iut.alldev.allin.data.repository.UserRepository
+import javax.inject.Inject
+
+@HiltViewModel
+class RegisterViewModel @Inject constructor(
+    val userRepository: UserRepository
+) : ViewModel() {
+
+    val username = mutableStateOf("")
+    val email = mutableStateOf("")
+    val password = mutableStateOf("")
+    val passwordValidation = mutableStateOf("")
+}
\ No newline at end of file
diff --git a/src/build.gradle b/src/build.gradle
index ddeebca..3acbbfe 100644
--- a/src/build.gradle
+++ b/src/build.gradle
@@ -2,10 +2,13 @@ buildscript {
     ext {
         compose_version = '1.2.0'
         accompanist_version = '0.25.1'
+        hilt_version = "2.45"
     }
 }// Top-level build file where you can add configuration options common to all sub-projects/modules.
 plugins {
     id 'com.android.application' version '7.4.2' apply false
     id 'com.android.library' version '7.4.2' apply false
     id 'org.jetbrains.kotlin.android' version '1.7.0' apply false
+    id("com.google.dagger.hilt.android") version "$hilt_version" apply false
+
 }
\ No newline at end of file
diff --git a/src/data/build.gradle b/src/data/build.gradle
index bed0e47..1864193 100644
--- a/src/data/build.gradle
+++ b/src/data/build.gradle
@@ -1,6 +1,7 @@
 plugins {
     id 'com.android.library'
     id 'org.jetbrains.kotlin.android'
+    id "kotlin-kapt"
 }
 
 android {
@@ -38,4 +39,8 @@ dependencies {
     testImplementation 'junit:junit:4.13.2'
     androidTestImplementation 'androidx.test.ext:junit:1.1.5'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.5.1'
+
+    //Hilt
+    implementation "com.google.dagger:hilt-android:$hilt_version"
+    kapt "com.google.dagger:hilt-android-compiler:$hilt_version"
 }
\ No newline at end of file
diff --git a/src/data/src/main/java/fr/iut/alldev/allin/data/di/RepositoryModule.kt b/src/data/src/main/java/fr/iut/alldev/allin/data/di/RepositoryModule.kt
new file mode 100644
index 0000000..2e8b757
--- /dev/null
+++ b/src/data/src/main/java/fr/iut/alldev/allin/data/di/RepositoryModule.kt
@@ -0,0 +1,17 @@
+package fr.iut.alldev.allin.data.di
+
+import dagger.Binds
+import dagger.Module
+import dagger.hilt.InstallIn
+import dagger.hilt.components.SingletonComponent
+import fr.iut.alldev.allin.data.repository.UserRepository
+import fr.iut.alldev.allin.data.repository.impl.UserRepositoryImpl
+import javax.inject.Singleton
+
+@Module
+@InstallIn(SingletonComponent::class)
+abstract class RepositoryModule {
+    @Singleton
+    @Binds
+    abstract fun provideUserRepository(userRepositoryImpl: UserRepositoryImpl): UserRepository
+}
\ No newline at end of file
diff --git a/src/data/src/main/java/fr/iut/alldev/allin/data/model/User.kt b/src/data/src/main/java/fr/iut/alldev/allin/data/model/User.kt
new file mode 100644
index 0000000..5a4e882
--- /dev/null
+++ b/src/data/src/main/java/fr/iut/alldev/allin/data/model/User.kt
@@ -0,0 +1,8 @@
+package fr.iut.alldev.allin.data.model
+
+data class User(
+    val id : String,
+    val username : String,
+    val email : String,
+    val coins : Int
+)
\ No newline at end of file
diff --git a/src/data/src/main/java/fr/iut/alldev/allin/data/repository/UserRepository.kt b/src/data/src/main/java/fr/iut/alldev/allin/data/repository/UserRepository.kt
new file mode 100644
index 0000000..2b7ebe4
--- /dev/null
+++ b/src/data/src/main/java/fr/iut/alldev/allin/data/repository/UserRepository.kt
@@ -0,0 +1,4 @@
+package fr.iut.alldev.allin.data.repository
+
+abstract class UserRepository {
+}
\ No newline at end of file
diff --git a/src/data/src/main/java/fr/iut/alldev/allin/data/repository/impl/UserRepositoryImpl.kt b/src/data/src/main/java/fr/iut/alldev/allin/data/repository/impl/UserRepositoryImpl.kt
new file mode 100644
index 0000000..7e0194f
--- /dev/null
+++ b/src/data/src/main/java/fr/iut/alldev/allin/data/repository/impl/UserRepositoryImpl.kt
@@ -0,0 +1,10 @@
+package fr.iut.alldev.allin.data.repository.impl
+
+import fr.iut.alldev.allin.data.repository.UserRepository
+import javax.inject.Inject
+
+class UserRepositoryImpl @Inject constructor(
+
+) : UserRepository() {
+
+}
\ No newline at end of file