curl --location --request POST 'https://developer.salesmartly.com/api/v2/assign-chat-user' \
--header 'external-sign;' \
--form 'session_id=""' \
--form 'chat_user_id=""' \
--form 'project_id=""' \
--form 'sys_user_id=""' \
--form 'assign_sys_user_id=""'
{
"code": 0,
"data": {},
"msg": "string"
}