need some help on maven and those optional parameters

Hi all,

I need to call Maven from a script with variables defined inside the script.
unforunately I’m not very familiar with Maven and I’m getting some trouble putting those extra parameters

what i have is something like this
the command im trying to run maven is

  1. mvn liquibase:update -Dusername=name -Dpassword=pass

heres the configuration in the pom file

  1.                     ${liquibase.username}
                        ${liquibase.password}
                        ./changeLog.xml
                        jdbc:oracle:thin:@db02:1521:XE
                        oracle.jdbc.driver.OracleDriver
                        False
                        true
                   
its passing in password and username as null
could someone tell me what i did wrong here?
thanks