Update token.sh with set flags

[Mearman]

• set -e causes the script to exit immediately if a command exits with a non-zero status.
• set -u causes the script to exit immediately if an unset variable is used.
• set -o pipefail causes the script to exit immediately if a pipe command fails.

[Mearman]

Sorry. Meant to mark this as non-draft. Still tinkering with different scenarios. Thank you for the review though!

[github-actions[bot]]

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