Configuration Guide     48
Managing System User Management Configurations
Step 4 end
Return to privileged EXEC mode. 
Step 5 copy running-config startup-config
Save the settings in the configuration file.
3.2.2  Configuring Enable Password
Follow these steps to create an account of other type:
Step 1 configure
Enter global configuration mode.
Step 2 aaa enable
Globally enable the AAA function.