.Net Entity Core Update-Database gives System.Data.SqlClient.SqlException (0x80131904): Login failed for user 'sa'

I am able to connect to SQL Server Management Studio with this user, but when I run Update-Database from the nuget package console, I get this error :

System.Data.SqlClient.SqlException (0x80131904): Login failed for user 'sa'. Error Number:18456, State:1, Class:14

Not Working

Server=(local);User Id=sa;Password=[password];Database=[Database]

Working

Server=(local);Trusted_Connection=True;Database=[Database];

What is the issue with first connection string or User ?