How to connect to an already existed user-password database table for authorization

Server
1

I have anohter existed web system using a user-password table for authorization.
Now I want the owncloud to use the same user-password authorization settings.
How can I set up owncloud?

2

Hi,

there is no such possibility included in ownCloud if its not one of the external user authentication methods listed here:

https://doc.owncloud.org/server/latest/admin_manual/configuration_user/user_auth_ftp_smb_imap.html
https://doc.owncloud.org/server/latest/admin_manual/configuration_user/user_auth_ldap.html

However you might find some apps providing additional external user authentication at the appstore:

https://apps.owncloud.com/

Those are the possibilities to authenticate ownCloud users against an external system / user database.

To sum-up: You can't just hook ownCloud into an existing database scheme of another application. This would need an implementation on your own.