Fortinet MR1 - Manual (Page 207)

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<listname> - an authentication login list.
Default Setting
None
Command Mode
Global Config
5.8.2.3 username login
This command assigns the specified authentication login list to the specified user for system
login. The <username> must be a configured <username> and the <listname> must be a
configured login list.
If the user is assigned a login list that requires remote authentication, all access to the
interface from all CLI, web, and telnet sessions will be blocked until the authentication is
complete.
Note that the login list associated with the ‘admin’ user cannot be changed to prevent
accidental lockout from the switch.
Syntax
username login <user> <listname>
<user> - is the login user name.
<listname> - an authentication login list.
Default Setting
None
Command Mode
Global Config