curl --location --request POST 'https://open.fxiaoke.com/oauth2.0/token' \
--header 'Content-Type: application/json' \
--data-raw '{
"grantType": "string",
"appId": "string",
"appSecret": "string",
"refreshToken": "string"
}'
{
"errorCode": 0,
"errorMessage": "success",
"accessToken": "accessToken",
"refreshToken": "refreshToken"
}