feat(authentication): add a setting to toggle automatic user provisioning when u… (#2068)

* feat(api): add a setting to toggle automatic user provisioning when using LDAP authentication

* fix(auth): fix an issue with AutoCreateUsers disabled

api/bolt/migrator/migrate_dbversion12.go

@@ -8,6 +8,7 @@ func (m *Migrator) updateSettingsToVersion13() error {
 		return err
 	}
 
+	legacySettings.LDAPSettings.AutoCreateUsers = false
 	legacySettings.LDAPSettings.GroupSearchSettings = []portainer.LDAPGroupSearchSettings{
 		portainer.LDAPGroupSearchSettings{},
 	}

api/bolt/migrator/migrator.go

@@ -170,6 +170,7 @@ func (m *Migrator) Migrate() error {
 		}
 	}
 
+	// Portainer 1.18.2-dev
 	if m.currentDBVersion < 13 {
 		err := m.updateSettingsToVersion13()
 		if err != nil {