fix: validate identifier param in likes endpoint

Author: danielroe

server/api/social/profile/[identifier]/likes.get.ts

@@ -2,8 +2,15 @@ import { IdentityUtils } from '#server/utils/atproto/utils/identity'
 
 export default defineEventHandler(async event => {
   const identifier = getRouterParam(event, 'identifier')
+  if (!identifier) {
+    throw createError({
+      status: 400,
+      message: 'identifier not provided',
+    })
+  }
+
   const utils = new IdentityUtils()
-  const minidoc = await utils.getMiniDoc(identifier || '')
+  const minidoc = await utils.getMiniDoc(identifier)
   const likesUtil = new PackageLikesUtils()
 
   return likesUtil.getUserLikes(minidoc)