Good day,

It is not obvious that only IDs of issue types should be used while creating new issue (as per the documentation of the method createIssue https://developer.atlassian.com/cloud/jira/platform/rest/v3/api-group-issues/#api-rest-api-3-issue-post).
It will be easier to understand this if there will be some sort of a hint area with this info.

Thank you for your product and good documentation!