NickServ maintains a database with addresses that are allowed to use the nickname without using the nickname password.
That can come in handy, since by adding an access mask you can use your nickname without having to type the password
every time you join, or you can give a friend access to your nickname without giving them the password.
You can view the access masks in this database using the ACCESS LIST command. The format is:
/NickServ ACCESS LIST
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