admin password protection

hi friends

i m using rb750 in this i m control the bandwidth every time i monitor the bandwidth other then me three of us know the admin password

i like to lock the admin password

so give me some ideas like access denied r protected message

the admin password should given to them so i need your help

Use allowed address in /system users (Use your ip address)
It will say Invalid username or password.

ya i tried it but entirely they cant log in i ask like read permission

Create a group with read permission in groups n assign that group for that user.