How do you create a Custom Field from the Script Runner Console?

[Michael Rakowski]

How do you create a Custom Field from the Script Runner Console?

If it is even possible?

After creating the custom field I then want to populate it:

https://developer.atlassian.com/cloud/jira/platform/rest/v2/#api-rest-api-2-field-fieldKey-option-post

The API manual says 
"Note that this operation cannot be used with the built-in custom fields. It only works with issue fields added by Connect apps, as described above."

So I am hoping Script Runner will get around this.

[Nic Brough -Adaptavist-]

What do you mean by "generate"?  Add a new one?  Populate one? 

[Michael Rakowski]

Add/create a new one.
https://developer.atlassian.com/cloud/jira/platform/rest/v2/#api-rest-api-2-issue-post

and after adding adding options

https://developer.atlassian.com/cloud/jira/platform/rest/v2/#api-rest-api-2-field-fieldKey-option-post