Hello,
Unfortunately there can only be one set of cPanel credentials at a time, any additional user you may have created is most probably for webdisk/ftp/email.
cPanel does not currently support multiple users to log into the cPanel interface and sharing the login would have to be done by either sharing the Username & Password, or adding different SSH keys to the account under the same username.
If you don’t remember the cPanel credentials you setup the account with then you can change the password via WHM using the Password Modification Tool.
The sub-accounts configured via ‘User Manager’ are valid only for Web Disk and FTP.
The cPanel documentation about this is here:
https://docs.cpanel.net/cpanel/preferences/user-manager/
Please let us know if you have any further queries about this.
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