diff --git a/Database.py b/Database.py
index 3a0241c..806f9cb 100644
--- a/Database.py
+++ b/Database.py
@@ -59,5 +59,17 @@ class Database:
             self._create_table("users", data)
 
     def add_user(self, user: User):
-        self.cursor(user.to_insert_sql()) 
+        self.cursor.execute(f"SELECT * FROM `users` WHERE `email` = '{user.email}'")
+        if (len(self.cursor.fetchall())):
+            return ("Email already used")
+        if (len(user.password) < 8):
+            return ("Password too short (minimum 8 chars)")
+        if (len(user.first_name) == 0):
+            return ("First name empty")
+        if (len(user.last_name) == 0):
+            return ("Last name empty")
+        if (len(user.username) == 0):
+            return ("Username empty")
+        self.cursor.execute(user.to_insert_sql()) 
+        self.mydb.commit()
 
diff --git a/User.py b/User.py
index 09e29bf..768fcd5 100644
--- a/User.py
+++ b/User.py
@@ -14,6 +14,7 @@ class User:
         """
         self.first_name: str = first_name;
         self.last_name: str = last_name;
+        self.email: str = email
         self.username: str = username;
         self.password: str = password;
         self.permission = permissions;
@@ -22,4 +23,4 @@ class User:
         """
         return text to add the user in the database
         """
-        return (f"INSERT INTO users (email, username, first_name, last_name, password) VALUES ({self.email}, {self.username}, {self.first_name}, {self.last_name}, {self.password})")
+        return (f"INSERT INTO users (email, username, first_name, last_name, password) VALUES ('{self.email}', '{self.username}', '{self.first_name}', '{self.last_name}', '{self.password}')")
diff --git a/register.py b/register.py
index 720acae..804ee3a 100644
--- a/register.py
+++ b/register.py
@@ -1,7 +1,23 @@
 import flask
+import User
+import database
 
 page = flask.Blueprint("register", __name__, template_folder="templates")
 
-@page.route("/register")
+@page.route("/register", methods = ['POST', 'GET'])
 def show():
-    return (flask.render_template("register/register.html"))
+    if (flask.request.method == 'GET'):
+        return (flask.render_template("register/register.html", error = None))
+    email = flask.request.form.get("email");
+    password = flask.request.form.get("password");
+    first_name = flask.request.form.get("firstname");
+    last_name = flask.request.form.get("lastname");
+    username = flask.request.form.get("pseudo");
+    if (email == None or password == None or first_name == None or last_name == None or username == None):
+        return (flask.render_template("register/register.html", error = "internal error"))
+    user = User.User(first_name, last_name, username, password, email, {});
+    error = database.database.add_user(user)
+    if (error != None):
+        return (flask.render_template("register/register.html", error = error))
+    return (flask.redirect("/panel"))
+