Problem with adding oauth2.0 (flow=password) authentication function settings on the swagger page

[mengshun2022]

I want to add OAuth2.0 (flow = password) authentication to the Swagger page, and add mandatory authentication to some interfaces to access. I want to set up a request to log in to the oauth route, body parameters, username and password, but when the swagger page is used, it responds with a 415 message "Did not attempt to load JSON data because the request Content-Type was not 'application/json'." The reason is that Content-Type in headers: application/x-www-form-urlencoded instead of application/json, I tried specifying Content-Type = 'application/json' in headers when configuring authentication, but it didn't work.

#python mains.py
from flask import jsonify, Flask, Response
from typing import Union
from asgiref.wsgi import WsgiToAsgi
from flask_restx import Api, Resource, fields

app = Flask(name)

authorizations = {
"oauth2.0": {
"type": "oauth2",
"flow": "password",
"tokenUrl": "oauth",
"scopes": {"read": "获取信息权限", "write": "编辑权限"},
"paths": {
"/oauth": {
"post": {
"summary": "OAuth 2.0 认证",
"description": "Authorize 认证",
"parameters": [
{
"name": "body",
"in": "body",
"required": True,
"schema": {
"type": "object",
"properties": {
"username": {
"type": "string",
"description": "Username for authentication",
},
"password": {
"type": "string",
"description": "Password for authentication",
},
},
},
}
],
"responses": {"200": {"description": "Authorization successful"}},
}
}
},
}
}

api = Api(
app,
version="1.0",
title="Flask API",
description=f"Flask swagger",
doc="/docs",
authorizations=authorizations,
)

@api.route("/oauth")
class ExampleResource(Resource):
@api.expect(
api.model(
"obj",
{
"account": fields.String(required=True, description="账号"),
"password": fields.String(required=True, description="密码"),
},
),
validate=True,
)
def post(self):
return jsonify({"data": 111})

if name == "main":
import uvicorn

app = WsgiToAsgi(app)
uvicorn.run(app, host="0.0.0.0", port=7788)