This program takes a google sheet that has the follwing cities and loweest price columns and then does the follwing
1- read the data from the google sheet using sheety api
2- populate the IATA code for each city using amadeus api
3- using those IATA codes, it tries to find flight prices from LAX to those cities codes that are lower than the lowest price column in the google sheet.
4- it searches fist for direct flights if it finds one. if it doesnt then it saeeches for multistops flights.
5- then it populates emails from another google sheet that has all the emails of the "signed in" users.
6- if results are found it sends a low price alert to those users as an SMS, WHatsApp and email .