fix: sshare testing as an alternative to sacctmgr account tests (#178)

Addresses issue #177 



<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

- **Bug Fixes**
- Enhanced error handling in account validation for SLURM, providing
more informative error messages.
- Implemented a fallback mechanism to verify SLURM account validity
through an additional command.
- **Chores**
- Updated the authorization token in the GitHub Actions workflow for
posting to Mastodon.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

---------

Co-authored-by: Johannes Köster <johannes.koester@uni-due.de>

Author: cmeesters

.github/workflows/post_to_mastodon.yml

@@ -21,7 +21,7 @@ jobs:
           timeout_minutes: 2
           max_attempts: 3
           command: |
-                     curl -X POST -H "Authorization: Bearer ${{ secrets.MASTODON_ACCESS_TOKEN }}" \
+                     curl -X POST -H "Authorization: Bearer ${{ secrets.MASTODONBOT }}" \
                      -F "status=New release in Snakemake project '${{ github.event.repository.full_name }}' for pull request '#${{ github.event.pull_request.number }}' merged: '${{ github.event.pull_request.title }}'. Get the latest release from #Bioconda or #Pypi." \
                      https://fediscience.org/api/v1/statuses \
                      -w "\nResponse code: %{http_code}\n" \

snakemake_executor_plugin_slurm/__init__.py

@@ -633,10 +633,24 @@ def test_account(self, account):
                 cmd, shell=True, text=True, stderr=subprocess.PIPE
             )
         except subprocess.CalledProcessError as e:
-            raise WorkflowError(
-                f"Unable to test the validity of the given or guessed SLURM account "
-                f"'{account}' with sacctmgr: {e.stderr}"
+            sacctmgr_report = (
+                "Unable to test the validity of the given or guessed "
+                f"SLURM account '{account}' with sacctmgr: {e.stderr}."
             )
+            try:
+                cmd = "sshare -U --format Account --noheader"
+                accounts = subprocess.check_output(
+                    cmd, shell=True, text=True, stderr=subprocess.PIPE
+                )
+            except subprocess.CalledProcessError as e2:
+                sshare_report = (
+                    "Unable to test the validity of the given or guessed"
+                    f" SLURM account '{account}' with sshare: {e2.stderr}."
+                )
+                raise WorkflowError(
+                    f"The 'sacctmgr' reported: '{sacctmgr_report}' "
+                    f"and likewise 'sshare' reported: '{sshare_report}'."
+                )
 
         # The set() has been introduced during review to eliminate
         # duplicates. They are not harmful, but disturbing to read.