Extracting a simple value from a .txt file

[Ivooo]

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[Junior]

Hello, Im a new Zabbix-User and I have a Problem with Zabbix 1.4.6. When I insert Systems into my Zabbix, the 'Admin' account was deleted unintentionally. So I have tried to create a new Admin in my SQL and granted all to this user. But it doesnt work in Zabbix What do I have to do that the...