"look access to router config"

sh runn with defined user priv levels is a bit tricky to configure since configuration commands must be at or below user defined privilege level. You could have something like this:

username user1 privilege 5 password 0 user1 privilege exec level 5 show configuration

This will enable user1 to issue show conf and view the entire config, but sh runn will give an empty config listing for reasons mentioned above. Also if you are using aaa new you must configure proper exec authorization since without it privilege levels defined in local usernames will be ignored.