Google Sheet onEdit(e) having permission problem - google-apps-script

Question

ERROR : You do not have permission to call ScriptApp.newTrigger. Required permissions: https://www.googleapis.com/auth/script.scriptapp.
Having permission problem to create time based trigger
function onEdit(e){
var sheetName = e.range.getSheet().getName()
if(sheetName == "Config")
{
if(e.range.getRow()==2 && e.range.getColumn()==1){
createSpreadsheetOpenTrigger()
}
}
}
function createSpreadsheetOpenTrigger() {
Logger.log("hello")
var ss = SpreadsheetApp.getActive();
ScriptApp.newTrigger('myFunction')
.forSpreadsheet(ss)
.onOpen()
.create();
}

Answer 1

For Simple Triggers, just running the script within the App Script Web IDE is enough and should prompt you with an authentication popup: Simple Auth Steps.
However, to programmatically create new Triggers you need to make sure the onEdit Trigger is Installable! This gives you increased permissions to do what you need.
We need to open up the dev console to set up an installable trigger.
We need to create a new trigger tied to our function. For installable triggers, it is best not to use the default simple trigger onEdit() function name.
Done! We should be able to run our functions based on triggers with increased permission scopes.