use ego-mgr for username/email instead of CLI flags

git-hangman-lab/scripts/git/repo-add-collaborators

@@ -3,6 +3,15 @@
 # Get the directory where this script is located
 SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
 
+# Get username from ego-mgr
+username=$(ego-mgr get default-username)
+
+# Check if username is provided
+if [[ -z "$username" ]]; then
+  echo "Error: default-username not set in ego-mgr, please contact ard"
+  exit 1
+fi
+
 roster=false
 
 # Parse arguments