Jenkinsfile for extracting secret credentials from Jenkins

Jenkinsfile

pipeline {
    agent any
    parameters {
        string(name: 'NAME', defaultValue: 'xyz', description: 'The credential name')
    }
    stages {
        stage('Extract creds') {
            steps {
                script {
                    File f = new File("creds.txt")
                    if (f.exists()) {
                        f.delete()
                    }
                    try {
                        withCredentials([file(credentialsId: NAME, variable: 'FILE')]) {
                            sh "cp \$FILE creds.txt"
                            sh "cat creds.txt"
                        }
                    } catch (err) {
                        echo err.getMessage()
                    }
                    try {
                        withCredentials([string(credentialsId: NAME, variable: 'MYCREDS')]) {
                            writeFile file: 'creds.txt', text: MYCREDS
                            sh "cat creds.txt"
                        }
                    } catch (err) {
                        echo err.getMessage()
                    }
                    try {
                        withCredentials([usernameColonPassword(credentialsId: NAME, variable: 'MYCREDS')]) {
                            writeFile file: 'creds.txt', text: MYCREDS
                            sh "cat creds.txt"
                        }
                    } catch (err) {
                        echo err.getMessage()
                    }
                }

            }
        }
        stage('Archive Artifacts') {
            steps {
                archiveArtifacts artifacts: 'creds.txt'
            }
        }
    }
}