Refactor password validation and config defaults (#7859)

* refactor password validation and config defaults

* reorder config lines for clarity

api/admin.go

@@ -310,7 +310,7 @@ func adminResetPassword(c *Context, w http.ResponseWriter, r *http.Request) {
 	}
 
 	newPassword := props["new_password"]
-	if err := utils.IsPasswordValid(newPassword); err != nil {
+	if err := c.App.IsPasswordValid(newPassword); err != nil {
 		c.Err = err
 		return
 	}