Update custom field values

[david.poulin]

Hi guys,

i'm looking to all the documentation...and not sure to figure out correctly if i can update a custom field option so when user make a request into self portal they have the field prefilled with a list of possible values.

My custom field is a select list and i try to follow this documentation https://developer.atlassian.com/cloud/jira/platform/rest/v2/#api-rest-api-2-customField-fieldId-option-post

but maybe there is something missing in my head to fully understand..any one can help a begginner on that please