rotationPeriod property
next_rotation_time will be advanced by this period when the service automatically rotates a key.
Must be at least 24 hours and at most 876,000 hours. If rotation_period is set, next_rotation_time must also be set. Keys with purpose ENCRYPT_DECRYPT support automatic rotation. For other keys, this field must be omitted.
Implementation
core.String? rotationPeriod;