Webinterface login refused!

I can not login to Webinterface of my graylog-server.
Did everthing like in instruction:
root_username = admin root_password_sha2 =
https://go2docs.graylog.org/5-2/setting_up_graylog/server.conf.html?tocpath=Setting%20up%20Graylog|Getting%20Started|Initial%20Configuration%20Settings|_____1

Ok, it’s the typical open source problem.
A lot of documentation, but all wrong.
In reality, the password for the first login is shown in the
/var/log/graylog-server/server.log

I quess you have the setup with the datanode - in this case yes, the password for the setup wizzard is printed in the serverlog.
Afterwards the “normal” login will succed with the password from the config as you liked it.