Need to access the Sharepoint API using credentials

Question

Hi There,

 

I need to download a list using the Sharepoint API, When ever I use my credentials it's throwing me an error saying Unauthorised access.

 

 https://site.domain.com/sites/siteee/branch/_api/web/lists/getbytitle('List name')/Items

 

 

Cheers,

Kuraldasan A.