diff --git a/bin/server.dart b/bin/server.dart
index abe9133..3fe0514 100755
--- a/bin/server.dart
+++ b/bin/server.dart
@@ -10,8 +10,9 @@ final _router = Router()
   // GET
   ..get('/', API.rootHandler)
   ..get('/admin/users', API.getAllUsers)
+  ..post('/user/salt', API.getSalt)
   // POST (EN VRAI C'EST DES GET AVEC UN BODY)
-  ..get('/user/password-file', API.downloadPasswordDb)
+  ..post('/user/password-file', API.downloadPasswordDb)
   ..post('/auth', API.authenticator)
   ..post('/user/account', API.createAccount) // vrai post
   // PUT
diff --git a/lib/api/api.dart b/lib/api/api.dart
index d39ee1f..8a8e1fc 100644
--- a/lib/api/api.dart
+++ b/lib/api/api.dart
@@ -13,6 +13,23 @@ class API {
     return Response.ok('Greetings from PassWorld!\n');
   }
 
+  static Future<Response> getSalt(Request req) async {
+    final List<String> required = ["email"];
+    final body = await bodyToJson(req);
+
+    if (await checkRequiredFields(required, body)) {
+      try {
+        String salt =
+            await AccountsToPostgres.selectSaltByMail(body[required[0]]);
+        return Response(200, body: salt);
+      } catch (e) {
+        return Response(204, body: 'Account already existing'); // No content
+      }
+    } else {
+      return Response.badRequest(body: 'bad body');
+    }
+  }
+
   // Check for authentication
   static Future<Response> authenticator(Request req) async {
     final List<String> required = ["email", "password"];
diff --git a/lib/database/accounts_to_postgres.dart b/lib/database/accounts_to_postgres.dart
index 1aaef87..984b898 100644
--- a/lib/database/accounts_to_postgres.dart
+++ b/lib/database/accounts_to_postgres.dart
@@ -8,16 +8,16 @@ class AccountsToPostgres {
   //     username: 'pass', password: '1p2a3s4s5');
 
   /* Dev RemRem */
-  // static final connection = PostgreSQLConnection("localhost", 5432, 'passworld',
-  //     username: 'hel', password: '');
+  static final connection = PostgreSQLConnection("localhost", 5432, 'passworld',
+      username: 'hel', password: '');
 
   /* Production */
-  static final connection = PostgreSQLConnection(
-      Platform.environment["DB_SERVER"]!,
-      5432,
-      Platform.environment["DB_DATABASE"]!,
-      username: Platform.environment["DB_USER"],
-      password: Platform.environment["DB_PASSWORD"]);
+  // static final connection = PostgreSQLConnection(
+  //     Platform.environment["DB_SERVER"]!,
+  //     5432,
+  //     Platform.environment["DB_DATABASE"]!,
+  //     username: Platform.environment["DB_USER"],
+  //     password: Platform.environment["DB_PASSWORD"]);
 
   AccountsToPostgres() {
     //initConnection();
@@ -89,6 +89,15 @@ class AccountsToPostgres {
     return results[0][0];
   }
 
+  // check if mail is already used in database
+  static Future<String> selectSaltByMail(String mail) async {
+    List<List<dynamic>> results = await connection.query(
+        "SELECT salt FROM \"Account\" WHERE mail=@mail",
+        substitutionValues: {"mail": mail});
+
+    return results[0][0];
+  }
+
   // Update user password
   static Future<void> updatePassword(
       String mail, String newHash, String newSalt) async {
@@ -148,7 +157,7 @@ class AccountsToPostgres {
   // ADMIN: get infos on all users
   static Future<PostgreSQLResult> getAllUsers() async {
     PostgreSQLResult res =
-        await connection.query("SELECT id, hash, salt from \"Account\"");
+        await connection.query("SELECT mail, hash, salt from \"Account\"");
     print("🟥 ADMIN: get all users");
     return res;
   }