Additional users (logins) for the admin interface

From an information security point of view, it is not a good idea to share logins (and therefore passwords) with multiple people. Under 'Settings' (bottom left after logging in), you can create additional subscribers. You can also change your own details, fill out the invoicing address, and possible set up two-step verification there.

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If you give someone else access to your admin interface, they will also get access to all of the underlying accounts. If you only want to give someone access to specific (underlying) accounts, here's how to do that.