Using Convert Time Format

Figured out my issues, it's a mistake in the Convert Time Format action. Both format fields tell you that you need to use Arrow format and not strptime, but they're mismatched. One is strptime and the other is Arrow. It's line 50 in the code that needs some fixing.

Still no luck. Saw it needs to be in arrow format so I tried YYYY-MM-DD'T'HH:mm:ss.SSS'Z' but '2021-09-10T19:02:06.951Z' does not match format YYYY-MM-DD'T'HH:mm:ss.SSS'Z'

Also tried YYYY-MM-DD[T]HH:mm:ss.SSSZ and YYYY-MM-DD[T]HH:mm:ss.SSSZ same result

Just made my own Shift Time action and fixed the problem. Default format is YYYY-MM-DD[T]HH:mm:ss.SSS[Z] . I still don't know what I was doing wrong with Convert Time but this works well for now:
from SiemplifyAction import *
import arrow
from dateutil import tz
import pytz

def main():
siemplify = SiemplifyAction()
siemplify.script_name='Convert Time Format'
params = siemplify.parameters
input_str = params.get('Input')
use_format = params.get('Format')
days = params.get('Days', 0) or 0
hours = params.get('Hours', 0) or 0
minutes = params.get('Minutes', 0) or 0
seconds = params.get('Seconds', 0) or 0

time = arrow.get(input_str)
new_time = time.shift(days=int(days), hours=int(hours), minutes=int(minutes), seconds=int(seconds))

result_value = new_time.format(use_format)

output_message = result_value
siemplify.end(output_message, result_value)

if __name__ == "__main__":
main()

Hi @Andrew Cook
Thank you for your input, we will update the documentation accordingly