use async function in sync function in javascript

I have a simple asynchronous function to get the current enviorment variable .I am trying to use this function marked in red in another sync function but getting value as promise pending. I know I am making an error calling this function. Can I get the idea  how to call it and utilize it?

// Asysc to get enviornment variable

GetEnvironmentVariableValue  function(name){let results =await Xrm.WebApi.retrieveMultipleRecords("environmentvariabledefinition",`?$filter=schemaname eq '${name}'&$select=environmentvariabledefinitionid&$expand=environmentvariabledefinition_environmentvariablevalue($select=value)`);if(!results ||!results.entities || results.entities.length <1)returnnull;let variable = results.entities[0];if(!variable.environmentvariabledefinition_environmentvariablevalue || variable.environmentvariabledefinition_environmentvariablevalue.length <1)returnnull;return variable.environmentvariabledefinition_environmentvariablevalue[0].value;// returning the value that I want. current value of env varibale}


//Calling it to another function and getting value as promise pending

  ...rest od the code..no need to see..
}}