salut j'ai un probléme au niveau de connexion a la base de donnée avec mysql
voila erreur
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Opening db connection
Cannot connect to this database.
java.sql.SQLException: Access denied for user 'root'@'localhost' (using password: NO)
Exception in thread "AWT-EventQueue-0" javax.persistence.PersistenceException: No Persistence provider for EntityManager named miniprojetPU
	at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:56)
	at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:34)
	at Frames.GestionUtilisateur.initComponents(GestionUtilisateur.java:59)
	at Frames.GestionUtilisateur.<init>(GestionUtilisateur.java:33)
	at Frames.Accueil$1.run(Accueil.java:94)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:721)
	at java.awt.EventQueue.access$200(EventQueue.java:103)
	at java.awt.EventQueue$3.run(EventQueue.java:682)
	at java.awt.EventQueue$3.run(EventQueue.java:680)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:691)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:244)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:163)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:147)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:139)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:97)