fatal: could not read Username for 'https://github.com': invalid url - github

Question

I am trying to setup auto merge for my main branch whenever something is pushed into the development branch using gitaction. This is my gitaction file:
name: Auto merge
on:
push:
branches:
- development
env:
# replace "github_username" with your GitHub username
# replace "github.com/username/repo.git" with your GitHub repo path
# do NOT replace ${{secrets.GITHUB_TOKEN}}, GitHub will take care of it
MY_REPO: https://my-username:${{secrets.GITHUB_TOKEN}}#github.com/organisation-username/repo.git
# replace "long-lived_branch_name" with your branch name
MY_BRANCH: development
# replace it with the path to master repo
MAIN_REPO: https://github.com/organisation-username/repo.git
# replace "master" with your master branch name
MAIN_BRANCH: main
jobs:
merge:
runs-on: ubuntu-latest
steps:
- name: Merge with master
run: |
git clone ${{env.MY_REPO}} -b ${{env.MY_BRANCH}} tmp
cd tmp
git config user.name "Automerge Bot"
git config user.email "gcpabia#gmail.com"
git config pull.rebase false
git pull ${{env.MAIN_REPO}} ${{env.MAIN_BRANCH}}
git push
The thing is I belong to the organization as owner, so the repo isn't in my personal account. I keep getting this error:
Run git clone ***github.com/organization-username/repo.git -b development tmp
Cloning into 'tmp'...
fatal: could not read Username for 'https://github.com': No such device or address
Error: Process completed with exit code 1.
My suspicion is that the issues might be the different usernames I am using to carryout this operation and have switched between that of the organization and my personal account with no success.
Any pointers as to what I am missing.