fix: 系统用户账号简单4位长度，密码简单6位

src/framework/utils/regular/regular.go

@@ -19,7 +19,7 @@ func ValidUsername(username string) bool {
 	if username == "" {
 		return false
 	}
-	pattern := `^[a-zA-Z][a-z0-9A-Z]{5,}`
+	pattern := `^.{4,}$` //`^[a-zA-Z][a-z0-9A-Z]{5,}`
 	match, err := regexp.MatchString(pattern, username)
 	if err != nil {
 		return false

src/modules/system/controller/sys_user.go

@@ -186,7 +186,7 @@ func (s *SysUserController) Add(c *gin.Context) {
 	}
 	if !regular.ValidUsername(body.UserName) {
 		// msg := fmt.Sprintf("新增用户【%s】失败，登录账号用户账号只能包含大写小写字母，数字，且不少于4位", body.UserName)
-		msg := fmt.Sprintf("Add a new user [%s] failed to log in the account user account can only contain upper and lower case letters, numbers, and not less than 4 digits", body.UserName)
+		msg := fmt.Sprintf("Add a new user [%s] failed to log in the account user account not less than 4 digits", body.UserName)
 		c.JSON(400, resp.ErrMsg(msg))
 		return
 	}