Your JBoss Application Server 7 is running However you have not yet added any users to be able to access the admin console

Message at: http://127.0.0.1:9990/error/index.html

Welcome to AS 7

Your JBoss Application Server 7 is running.

However, you have not yet added any users to be able to access the admin console.

To add a new user execute the add-user.sh script within the bin folder of your AS 7 installation 
and enter the requested information.

By default the realm name used by AS 7 is "ManagementRealm" this is already selected by default.

If you have just installed and configured the JBoss server with your Eclipse IDE and while accessing Admin Console (http://127.0.0.1:9990/console/App.html) you get the above message, then its because you need to create a user for admin using add-user.sh script first to access admin console, let's see the steps to do this,

1. Open Terminal (Mac OS or Linux system) or Command Prompt (Windows)
2. Move to bin location : /jboss-as-7.1.1.Final/bin
3. Now execute : ./add-user.sh command, you would see the following,

What type of user do you wish to add? 
 a) Management User (mgmt-users.properties) 
 b) Application User (application-users.properties)
(a): 

4. Select option a

   Enter the username and password details :
   Enter the details of the new user to add.
   Realm (ManagementRealm) : 
   Username : admin
   Password : 
   Re-enter Password : 
   The username 'admin' is easy to guess
   Are you sure you want to add user 'admin' yes/no? yes
   About to add user 'admin' for realm 'ManagementRealm'
   Is this correct yes/no? yes
   Added user 'admin' to file '/Users/abc/Setups/jboss-as-7.1.1.Final/standalone/configuration/
   mgmt-users.properties'
   Added user 'admin' to file '/Users/abc/Setups/jboss-as-7.1.1.Final/domain/configuration/
   mgmt-users.properties'
   localhost:bin abc$

5. Now try to access admin console: http://127.0.0.1:9990/console/App.html
6. You would be promoted to enter username and password.

Note: Username and Password cannot be the same, you will get * Error * JBAS015238: Username must not match the password. if you do so

Note: If you add the username as admin you would get a warning saying The username 'admin' is easy to guess so its better to select some other name.