@ -315,7 +315,7 @@ public final class Constants {
/**
* user name regex
*/
public static final Pattern REGEX_USER_NAME = Pattern.compile("^[a-zA-Z0-9_-]{3,20}$");
public static final Pattern REGEX_USER_NAME = Pattern.compile("^[a-zA-Z0-9._-]{3,20}$");
* email regex