Custom connector Power Bi

ok, thank you,

Now, i put:

section HelloWorld;

[DataSource.Kind="HelloWorld", Publish="HelloWorld.Publish"]
shared HelloWorld.Contents = (optional message as text) =>

    let
			qry = "Select.....",
			Source = Oracle.Database("ORADES11", [HierarchicalNavigation=true, Query=qry])
    in
                        Source;

HelloWorld = [
    TestConnection = (dataSourcePath) => {"HelloWorld.Contents"},
    Authentication = [
        Anonymous = []
    ],
    Label = Extension.LoadString("DataSourceLabel")
];

HelloWorld.Publish = [
    Beta = true,
    ButtonText = { Extension.LoadString("FormulaTitle"), Extension.LoadString("FormulaHelp") },
    SourceImage = HelloWorld.Icons,
    SourceTypeImage = HelloWorld.Icons
];

HelloWorld.Icons = [
    Icon16 = { Extension.Contents("HelloWorld16.png"), Extension.Contents("HelloWorld20.png"), Extension.Contents("HelloWorld24.png"), Extension.Contents("HelloWorld32.png") },
    Icon32 = { Extension.Contents("HelloWorld32.png"), Extension.Contents("HelloWorld40.png"), Extension.Contents("HelloWorld48.png"), Extension.Contents("HelloWorld64.png") }
];