Gitlab-ci .yaml configuration for posting Postman tests via Jira Xray API

My .gitlab-ci.yaml file v

stages:
    - test

postman_tests:
    stage: test
    image: 
        name: postman/newman_alpine33
        entrypoint: [""]
    script:
        - newman --version
        - npm install -g newman-reporter-junitfull
        - npm install -g newman-reporter-junitxray
        - apk add --update curl && rm -rf /var/cache/apk/*
        - newman run https://api.postman.com/collections/25618800-2d1d5da6-05f3-4d88-88d1-faebffca89f7?access_key=PMAT-01GTVPN0MGG60TY1EX9G4JTFEH -r 'cli,junitfull,junitxray' --reporter-junitfull-export postman_echo_junitfull.xml
        - export token=$(curl -H "Content-Type: application/json" -X POST --data "{ \"client_id\": \"$client_id\",\"client_secret\": \"$client_secret\" }"  https://xray.cloud.getxray.app/api/v2/authenticate| tr -d '"')
        - echo $token
        - 'curl -H "Content-Type: text/xml" -X POST -H "Authorization: Bearer $token"  --data @"postman_echo_junitfull.xml" https://xray.cloud.getxray.app/api/v2/import/execution/junit?projectKey=TSTXR&testPlanKey=${TESTPLAN}'
    artifacts:
        when: always
        paths:
            - postman_echo_junitfull.xml

For line below I get an error (red underline) about "Nested mappings are not allowed in compact mappingsYAML(0)" and "Incorrect type. Expected "string | array".yaml-schema: https://gitlab.com/assets/webpack/ci.030957f4.json"

export token=$(curl -H "Content-Type: application/json" -X POST --data "{ \"client_id\": \"$client_id\",\"client_secret\": \"$client_secret\" }" https://xray.cloud.getxray.app/api/v2/authenticate| tr -d '"')

Could someone please help and correct it for me as I don't know where the issue is

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The YAML syntax is giving you trouble here. Because your string contains a literal colon character (:) you're accidentally creating a key-value (key: value) mapping in YAML. To avoid this, you should use quotes around your script item to explicitly make sure it is interpreted as a string. You'll also need to escape the inner quotes.

For example, wrap the line in single quotes (') and then the literal single quotes within your string need to be escaped by prefixing them with another single quote -- '' within a single-quoted string is interpreted to be a single literal quote ('). Like this:

script:
  # ...
  - 'export token=$(curl -H "Content-Type: application/json" -X POST --data "{ \"client_id\": \"$client_id\",\"client_secret\": \"$client_secret\" }"  https://xray.cloud.getxray.app/api/v2/authenticate| tr -d ''"'')'
  # ...