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I was following the jenkinsfile documentation and I tried to use a secret text in my pipeline but I got the error "groovy.lang.MissingPropertyException: No such property: $AWS_SECRET_ACCESS_KEY for class: groovy.lang.Binding"

This is my jenkinsfile. I also tried wrapping the variable like echo "${AWS_SECRET_ACCESS_KEY}" but neither works. I found an alternative solution is with a withCredentials line but I want to know why it doesn't work because I found clearer the jenkins file if I add that data as variables.

Implementing "withCredentils" it tells me: "groovy.lang.MissingPropertyException: No such property: set for class: groovy.lang.Binding" and I found that it seems I need to downgrade my security...

pipeline {
    agent any
    environment {
        AWS_ACCESS_KEY     = credentials('AWS_ACCESS_KEY_ID')
        AWS_SECRET_KEY = credentials('AWS_SECRET_ACCESS_KEY')
    stages {
        stage('Test') {
            steps {
                echo 'Testing..'
                echo $AWS_SECRET_KEY
                echo $AWS_ACCESS_KEY
        stage('Deploy') {
            steps {
                echo 'Deploying....'
                sh "npx serverless --no-aws-s3-accelerate --key $AWS_ACCESS_KEY --secret $AWS_SECRET_KEY"
EDIT: fix second implementation of credentials
                AWS_SECRET_ACCESS_KEY is to my understanding the ID of the credential object. You need to use $AWS_ACCESS_KEY and $AWS_SECRET_KEY in the shell command.
– Christopher
                Dec 5, 2019 at 22:28
echo ${AWS_SECRET_ACCESS_KEY}  will not work, because only the credentials steps can return the content of credentials into your pipeline context.
withCredentils <-- typo
I would suggest to use 'withCredentials' (
https://plugins.jenkins.io/credentials-binding)
after you have created a new credential (AWS type) (using 'the CloudBees Aws Credential Plugin' :
https://wiki.jenkins.io/display/JENKINS/CloudBees+AWS+Credentials+Plugin)
Im not very familiar with declarative pipeline syntax, so it might not be the best way to do it.
Anyway, you need to add a script block :
stage('Deploy') {
    steps {
        script {
            withCredentials([[
                class: 'AmazonWebServicesCredentialsBinding',
                credentialsId: awsCredentialId,
                accessKeyVariable: 'AWS_ACCESS_KEY',
                secretKeyVariable: 'AWS_SECRET_KEY'
            ]]) {
                    println 'Deploying....'
                    sh " npx serverless --no-aws-s3-accelerate --key $AWS_ACCESS_KEY --secret $AWS_SECRET_KEY"
you can simply call the credentials like this.
 withCredentials([usernamePassword(credentialsId: "${jenkinsCredentialsId}", usernameVariable: 'USERNAME', passwordVariable: 'PASSWORD')]) {
                 // your command here
        
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