Use credentials when checking GitHub

ci/scripts/detect-ubuntu-image-updates.sh

@@ -11,8 +11,8 @@ if [[ $current = $latest ]]; then
 	exit 0;
 fi
 
-milestone_number=$( curl -s https://api.github.com/repos/${GITHUB_ORGANIZATION}/${GITHUB_REPO}/milestones\?state\=open | jq -c --arg MILESTONE "$MILESTONE" '.[] | select(.title==$MILESTONE)' | jq -r '.number')
-existing_tasks=$( curl -s https://api.github.com/repos/${GITHUB_ORGANIZATION}/${GITHUB_REPO}/issues\?labels\=type:%20task\&state\=open\&creator\=spring-builds\&milestone\=${milestone_number} )
+milestone_number=$( curl -u ${GITHUB_USERNAME}:${GITHUB_PASSWORD} -s https://api.github.com/repos/${GITHUB_ORGANIZATION}/${GITHUB_REPO}/milestones\?state\=open | jq -c --arg MILESTONE "$MILESTONE" '.[] | select(.title==$MILESTONE)' | jq -r '.number')
+existing_tasks=$( curl -u ${GITHUB_USERNAME}:${GITHUB_PASSWORD} -s https://api.github.com/repos/${GITHUB_ORGANIZATION}/${GITHUB_REPO}/issues\?labels\=type:%20task\&state\=open\&creator\=spring-builds\&milestone\=${milestone_number} )
 existing_upgrade_issues=$( echo "$existing_tasks" | jq -c --arg TITLE "$ISSUE_TITLE" '.[] | select(.title==$TITLE)' )
 
 if [[ ${existing_upgrade_issues} = "" ]]; then