Login to weblogic console and click on Security Realms as shown below
Click on myrealm as shown below
watch Step 3:
Now goto Users and Groups→ Users→ New as shown below
Now enter the details as shown below and click on Ok
Now assign the roles for the user.
Click on the user which we just created as shown below.
And then go to Groups and select the required role and Save it.
That’s it we are done with creating new user