How to fix error :url_decode, base64_encode are not a member of ‘pion::http::types’?

Question

I am building an application with pion 5.0.6. libraries. The file contains pion-net 2.2.12 functions which are url_decode , url_encode, base64_encode.These functions are not defined in new version pion 5.0.6. So what can I replace in place of these function calls.

 This is the error I am getting:
 error: ‘url_decode’ is not a member of ‘pion::http::types’
 return pion::http::types::url_decode(crs);