I have found documentation on how to increase the service limits on automation for the server edition. Is it also possible to increase these limits of needed on the cloud version?
Well personally I suggest you to use python requests if you insist using method above. Or you can use jira python client.
You don't have to 'login first', just send request to endpoint you want with header "Authorization: Basic BASE_64", you can find more info at https://developer.atlassian.com/display/JIRADEV/JIRA+REST+API+Example+-+Basic+Authentication
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