the Content-Type requested by the client is not supported: application/x-www-form-urlencoded

[iincity]

poem-openapi = { version = "5.1.14", features = ["swagger-ui"]}
poem = { version = "3.1.10", features = ["static-files", "test"] }

POST /v1/register HTTP/1.1
Host: 192.168.253.1:3000
Connection: keep-alive
Content-Length: 121
X-WX-LType: 1
User-Agent: Mozilla/5.0 (iPhone; CPU iPhone OS 15_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.0 Mobile/15E148 Safari/604.1 wechatdevtools/1.06.2412050 MicroMessenger/8.0.5 Language/zh_CN webview/
content-type: application/x-www-form-urlencoded
Accept: /
Referer: https://servicewechat.com/wx05db44d137604fa4/devtools/page-frame.html
Accept-Encoding: gzip, deflate

regtype=3&userType=0&code=0b1SIy0w3pPbV43zOu0w3Qklkz0SIy0N&nickName=&province=&city=&encryptedData=undefined&iv=undefined

HTTP/1.1 415 Unsupported Media Type
content-type: text/plain;
charset=utf-8
content-length: 94
date: Fri, 16 May 2025 02:14:53 GMT

the Content-Type requested by the client is not supported: application/x-www-form-urlencoded

What am I doing wrong?