Duration

Duration values support the following units:

• s - seconds
• m - minutes
• h - hours
• d - days (24 hours)
• w - weeks (7 days)
• M - months (30 days)
• y - years (365 days)

Examples: 30s, 5m, 2h, 1d, 2w

A bare 0 (no unit) is also accepted; fields document what 0 means for them (usually "disabled" or "never expires").