This content is part of a third party extension that is not supported by the Cake project. For more information about this extension see Cake.DotNetCoreEf.

public static void DotNetCoreEfMigrationAdd(this ICakeContext context, string project, DotNetCoreEfMigrationAddSettings settings)

var settings = new DotNetCoreEfMigrationAddSettings
{
    Context = SchoolContext
};

DotNetCoreEfMigrationAdd("./src/Project", settings);