没有配置要使用的数据服务，请修改全局配置中的datafeed相关内容 #55
Description
这应该怎么改？
SETTINGS: dict = {
"font.family": "微软雅黑",
"font.size": 12,
"log.active": True,
"log.level": CRITICAL,
"log.console": True,
"log.file": True,
"email.server": "smtp.qq.com",
"email.port": 465,
"email.username": "",
"email.password": "",
"email.sender": "",
"email.receiver": "",
"datafeed.name": "",
"datafeed.username": "",
"datafeed.password": "",
"database.timezone": get_localzone_name(),
"database.name": "sqlite",
"database.database": "database.db",
"database.host": "",
"database.port": 0,
"database.user": "",
"database.password": ""
}