jenkins token generation

#!/bin/bash

set -ex

source credentials.sh

export JENKINS_URL=http://127.0.0.1:8080
export NODE_NAME=foobar3

export JENKINS_CRUMB=$(curl --cookie-jar jenkins-cookies -s -X GET $JENKINS_URL/crumbIssuer/api/json --user ${JENKINS_USERNAME}:${JENKINS_PASSWORD}  | jq -r '.crumb')
export JENKINS_TOKEN=$(curl --cookie-jar jenkins-cookies -s -X POST "${JENKINS_URL}/user/${JENKINS_USERNAME}/descriptorByName/jenkins.security.ApiTokenProperty/generateNewToken" --data 'newTokenName=kb-token' --user ${JENKINS_USERNAME}:${JENKINS_PASSWORD} -H "Jenkins-Crumb:${JENKINS_CRUMB}")


JSON_OBJECT=$(cat << EOM
{
    "Jenkins-Crumb": "${JENKINS_CRUMB}",
    "": [
        "hudson.plugins.sshslaves.SSHLauncher",
        "hudson.slaves.RetentionStrategy\$Always"
    ],
    "launcher": {
        "": "2",
        "\$class": "hudson.plugins.sshslaves.SSHLauncher",
        "credentialsId": "d436fff1-af1c-45df-8cb6-3907d119b8fa",
        "host": "host",
        "javaPath": "",
        "jvmOptions": "",
        "launchTimeoutSeconds": "",
        "maxNumRetries": "",
        "port": "22",
        "prefixStartSlaveCmd": "",
        "suffixStartSlaveCmd": "",
        "retryWaitTime": "",
        "sshHostKeyVerificationStrategy": {
            "\$class": "hudson.plugins.sshslaves.verifiers.ManuallyTrustedKeyVerificationStrategy",
            "requireInitialManualTrust": true,
            "stapler-class": "hudson.plugins.sshslaves.verifiers.ManuallyTrustedKeyVerificationStrategy"
        },
        "stapler-class": "hudson.plugins.sshslaves.SSHLauncher"
    },
    "retentionStrategy": {
        "\$class": "hudson.slaves.RetentionStrategy\$Always",
        "stapler-class": "hudson.slaves.RetentionStrategy\$Always"
    },
    "type": "hudson.slaves.DumbSlave",
    "mode": "NORMAL",
    "name": "${NODE_NAME}",
    "numExecutors": "1",
    "remoteFS": "/home/jenkins",
    "nodeDescription": "Agent node description",
    "labelString": "agent-node-label",
    "nodeProperties": {
        "stapler-class-bag": "true"
    }
}
EOM
)

curl -v -L -s -o /dev/null -w "%{http_code}" -u "${JENKINS_USERNAME}:${JENKINS_TOKEN}" \
    -H "Content-Type:application/x-www-form-urlencoded" \
    -H "Jenkins-Crumb:${JENKINS_CRUMB}" \
    -X POST \
    -d 'json=${JSON_OBJECT}' "${JENKINS_URL}/computer/doCreateItem?name=${NODE_NAME}&type=hudson.slaves.DumbSlave"