Update xorm to latest version and fix correct user table referencing in sql (#4473)

vendor/github.com/go-xorm/xorm/session_exist.go

@@ -57,7 +57,7 @@ func (session *Session) Exist(bean ...interface{}) (bool, error) {
 			}
 
 			if beanValue.Elem().Kind() == reflect.Struct {
-				if err := session.statement.setRefValue(beanValue.Elem()); err != nil {
+				if err := session.statement.setRefBean(bean[0]); err != nil {
 					return false, err
 				}
 			}