Need guidance on implementation of OAuth for OIC connection authentication

One of our customer is using OIC integration and are using Basic Authentication method for connection authentication. The username and the password that they provide for authentication expires every 90 days. At that time all the integrations using the connection fails and then IT team has to refresh the credentials to bring the connection up. This is a recurrent issue for customer. We want to get rid of Basic username based connection and use OAuth. Not much of experience in OIC in the team. Is there any documentation or guide which can guide us on step by step process to