public function run()
 {
     $programme = Programme::where('id', '=', '420AA')->first();
     $classeCN2 = Classe::where('code', '=', '420-CN2-DM')->first();
     $classeDM1 = Classe::where('code', '=', '420-DM1-DM')->first();
     $classeDM2 = Classe::where('code', '=', '420-DM2-DM')->first();
     $roleadmin = Role::where('name', '=', 'admin')->first();
     $roleprof = Role::where('name', '=', 'professeur')->first();
     $roleetudiant = Role::where('name', '=', 'etudiant')->first();
     DB::table('users_classes')->delete();
     DB::table('users')->delete();
     $user = new User();
     $user->name = 'Admin';
     $user->nom = 'systeme';
     $user->prenom = 'admin';
     $user->type = 'p';
     $user->email = '*****@*****.**';
     $user->password = Hash::make('usager');
     $user->save();
     $user->attachRole($roleadmin);
     $user = new User();
     $user->name = 'prof1';
     $user->nom = 'prof1 ';
     $user->prenom = 'un';
     $user->type = 'p';
     $user->email = '*****@*****.**';
     $user->password = Hash::make('usager');
     $programme->users()->save($user);
     $user->attachRole($roleprof);
     $user->classes()->sync([$classeCN2->id, $classeDM1->id]);
     $user = new User();
     $user->name = 'prof2';
     $user->nom = 'prof2 ';
     $user->prenom = 'deux';
     $user->type = 'p';
     $user->email = '*****@*****.**';
     $user->password = Hash::make('usager');
     $programme->users()->save($user);
     $user->attachRole($roleprof);
     $user->classes()->sync([$classeCN2->id, $classeDM2->id]);
     $user = new User();
     $user->name = 'etudiant1';
     $user->nom = 'etudiant';
     $user->prenom = 'un';
     $user->type = 'e';
     $user->email = '*****@*****.**';
     $user->password = Hash::make('usager');
     $programme->users()->save($user);
     $user->attachRole($roleetudiant);
     $user->classes()->sync([$classeCN2->id, $classeDM1->id]);
     $user = new User();
     $user->name = 'etudiant2';
     $user->nom = 'etudiant2';
     $user->prenom = 'deux';
     $user->type = 'e';
     $user->email = '*****@*****.**';
     $user->password = Hash::make('usager');
     $programme->users()->save($user);
     $role = Role::where('name', '=', 'etudiant')->first();
     $user->attachRole($roleetudiant);
     $user->classes()->sync([$classeCN2->id, $classeDM1->id, $classeDM2->id]);
 }