Power Apps and Power Automate user Licenses

Hi All,

We are trying to create a Power App which is canvas app and data source is SharePoint Online, WCF service in Power Platform.

This Power App need to call the WCF Service and it should consume the response of this WCF Service.

Please suggest what are the best recommended possible ways to call a WCF service in Power App. 

In case if we require premium or custom connectors to achieve this in power platform is per user

premium Power Platform license the recommended licensing option for this requirement.

Also In case if we go for premium power app, power automate license will all the end users who are going to use this Power app require premium license or basic license is sufficient for end users who use this Power App and only Microsoft 365 admin user requires this premium power platform license.

Any suggestions will be greatly appreciated.

Regards.

Avinash.