diff --git a/app.py b/app.py
index 0e63cdc..4185675 100644
--- a/app.py
+++ b/app.py
@@ -26,14 +26,15 @@ def login():
 @app.route('/register', methods=['POST'])
 def register():
     cookie_jwt = request.cookies.get('jwt')
+    if cookie_jwt is not None:
+        username = jwt.check_jwt(cookie_jwt)
+    else:
+        return make_response(json.dumps({'result': 'fail'}))
     rdata = json.loads(request.data.decode())  # request data
-    username = rdata['username']
     program_type = rdata['program_type']
     program_name = rdata['program_name']
-    if cookie_jwt is not None:
-        if jwt.check_jwt(cookie_jwt):
-            if dao.register(username, program_type, program_name):
-                return make_response(json.dumps({'result': 'success'}))
+    if dao.register(username, program_type, program_name):
+        return make_response(json.dumps({'result': 'success'}))
     return make_response(json.dumps({'result': 'fail'}))
 
 
diff --git a/dao.py b/dao.py
index ff918fd..576262e 100644
--- a/dao.py
+++ b/dao.py
@@ -7,8 +7,10 @@ def valid(username, password):
     password_cursor = base_cursor.execute(f'SELECT password FROM user WHERE username=="{username}";')
     db_password = password_cursor.fetchone()
     if db_password is None:
+        db_connection.close()
         return False
     if db_password[0] == password:
+        db_connection.close()
         return True
 
 
@@ -16,5 +18,7 @@ def register(username, program_type, program_name):
     db_connection = sqlite3.connect('sports-registration.sqlite')
     base_cursor = db_connection.cursor()
     base_cursor.execute(f'INSERT INTO list (username, program_type, program_name) '
-                        f'VALUES ("{username}", "{program_type}", "{program_name}")')
+                        f'VALUES ("{username}", "{program_type}", "{program_name}");')
+    db_connection.commit()
+    db_connection.close()
     return True