Is DAX function allowed in QUERY part of SOURCE?

[bahadur]

I am trying to parameterize the source of a query as below:

= Sql.Database("myServer", "myDB", [Query="EXEC [myProc] '" & USERNAME() &"'", HierarchicalNavigation=true])

So that based on the user logged in (return by DAX function USERNAME) the stored proc will return realted data.

Is this conceptually allowed?  If so what is the correct syntax?

I have managed to make following work:

= Sql.Database(SQLServer, config[parmValue]{1}, [Query="EXEC [myProc];", HierarchicalNavigation=true])

where SQLServer is a parameter and config is just a table.

Thank you.

** [first post so apologize for any breach(es) of etiquette/protocol].