如何限制write访问/lastmodified表中的数据库名为/functions-project-12345只有云的功能,read & write访问表/chat给大家
/functions-project-12345
/lastmodified: 1234567890
/chat
/key-123456
username: "Mat"
text: "Hey Bob!"
/key-123457
username: "Bob"
text: "Hey Mat"
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