How do I use my gitlab personal access token in my jelastic jps manifests?

Question

Until now, I have always been working with public repositories, where everything is smooth and easy. However, I would like to now switch to private repos.

I saw this answer related to github repos. Unfortunately, it seems like it doesn't work the same for gitlab. In particular, the ?access_token=${settings.accessToken} does not seem to be recognized well by gitlab.

How should I proceed with my gitlab access token? What I was able to figure out until now (but I find this a little bit crap), is that I should replace

baseUrl: https://www.my-gitlab.com/my-company/my-project/my-repo/-/raw/master

onInstall:
  - cmd:
    - curl -fsSL ${baseUrl}/my-folder/my-script.sh | /bin/sh 
    - wget ${baseUrl}/my-folder/my-script.sh -O my-script.sh

with

globals:
  GITLAB_API_URL: http://www.my-gitlab.com/api/v4/projects/my-project-id/repository/files

onInstall:
  - cmd:
    - curl -H "PRIVATE-TOKEN: ${settings.accessToken}" -fsSL ${globals.GITLAB_API_URL}/my-folder%2Fmy-script.sh/raw?ref=master | /bin/sh
    - wget --header="PRIVATE-TOKEN: ${settings.accessToken}" ${globals.GITLAB_API_URL}/my-folder%2Fmy-script.sh/raw?ref=master -O my-script.sh

But I find the above replacement a bit complicated. I'm pretty sure there must be something equivalent to what is done with github on gitlab. Also, the above replacement does not quite work. For example, the call

curl -H "PRIVATE-TOKEN: ${settings.accessToken}" -fsSL ${globals.GITLAB_API_URL}/my-folder%2Fmy-script.sh/raw?ref=master | /bin/sh

with ${settings.accessToken} and ${globals.GITLAB_API_URL} replaced with the relevant values, works fine on my development PC; however, when that command runs on jelastic, I get the error

/bin/bash: line 1: {curl -H \"PRIVATE-TOKEN:<my-token>\" -fsSL http://www.my-gitlab.com/api/v4/projects/my-project-id/repository/files/my-folder/my-script.sh/raw?ref=master | /bin/sh}: No such file or directory","nodeid":63261,"exitStatus":127,"out":""}

I have no clue why that does not work and I guess using the gitlab api is not the right way to get my stuff done with curl and wget. Also, I have no clue how to get stuff like this working:

onInstall:
  install:
    jps: ${baseUrl}/jelastic/tools.jps?access_token=${settings.accessToken}

Can someone help?