Fix username validation

Multiple dashes in a row is VALID

src/utils.js

@@ -46,9 +46,10 @@ export function validateAccountName(value) {
     if (!/^[a-z0-9-]*$/.test(label)) {
       return suffix + "have only letters, digits, or dashes.";
     }
-    if (/--/.test(label)) {
-      return suffix + "have only one dash in a row.";
-    }
+    // Multiple dashes in a row is VALID
+    // if (/--/.test(label)) {
+    //   return suffix + "have only one dash in a row.";
+    // }
     if (!/[a-z0-9]$/.test(label)) {
       return suffix + "end with a letter or digit.";
     }