Created integration user, assigned and trying to fetch SR using REST Api but hitting 404 error

Summary:

created an integration user and added all correct roles via Oracle documentation, the connection between 2 systems work

Trying to use rest api to push/pull updates via SR and hitting 404 error, is there any other setup needed or do you have a full list of roles/duties etc needed for this user?

Content (please ensure you mask any confidential information):
attached

Version (include the version you are using, if applicable):

26a

Code Snippet (add any code snippets that support your topic, if applicable):