Website building

hello here,

I am a beginner in web development, I come to you here to solicit your help.
indeed, I host my site I try to access but I see the error (see the bottom of the message) but I do not know how to solve this problem.
if anyone could help me I would be grateful.
thank you

Fatal error: Uncaught PDOException: SQLSTATE[HY000] [1045] Access denied for user ‘ticescort’@‘2a02:4780:bad:1:fced:1ff:fe01:185’ (using password: YES) in /storage/ssd3/366/6725366/public_html/librairies/bdd.php:14 Stack trace: #0 /storage/ssd3/366/6725366/public_html/librairies/bdd.php(14): PDO->__construct(‘mysql:host=ns02…’, ‘ticescort’, ‘Passwort’) #1 /storage/ssd3/366/6725366/public_html/librairies/model.php(10): Database->__construct() #2 /storage/ssd3/366/6725366/public_html/modeles/index_model.php(3): Models->__construct() #3 /storage/ssd3/366/6725366/public_html/librairies/controleur.php(17): Index_Model->__construct() #4 /storage/ssd3/366/6725366/public_html/librairies/router.php(25): Controleur->LoadModel(‘index’) #5 /storage/ssd3/366/6725366/public_html/index.php(15): Router->__construct() #6 {main} thrown in /storage/ssd3/366/6725366/public_html/librairies/bdd.php on line 14

User and host is wrong.
Go to 000webhost then Manage Database and create or take the values of the database and username if it already exists from that page and insert these into your script configuration or install.