withCredentials([string(credentialsId: 'mvnrepo-keystore-pass', variable: 'JENKINSPASS')]) {
              withMaven( 
                mavenOpts: '-Djavax.net.ssl.keyStore=effaced.p12    -Djavax.net.ssl.keyStoreType=pkcs12 -Djavax.net.ssl.keyStorePassword=${JENKINSPASS}',
                mavenSettingsConfig: 'my-maven-settings') {
                sh 'mvn help:effective-settings -U'
            }
          }  

          withCredentials([string(credentialsId: 'mvnrepo-keystore-pass', variable: 'JENKINSPASS')]) {
              withMaven( 
                mavenSettingsConfig: 'my-maven-settings') {
                sh 'MAVEN_OPTS="-Djavax.net.ssl.keyStore=effaced.p12  -Djavax.net.ssl.keyStoreType=pkcs12 -Djavax.net.ssl.keyStorePassword=${JENKINSPASS}" mvn help:effective-settings -U'
            }
          }