Few Fixes in Flutter Mobile app

Hello I need someone's help to fix few issues on my flutter app as mentioned below
1. Logout functionality needs to be added
2. I am using geo location to fetch weather information form another api, and passing Lat/Lon to it, fetching geolocaiton takes much time, I need to speed up this screen
3. there is a screen with map where user put address to auto complete and when address is selected I fill it in that text field which we use to search I need to change address format like this Addres Line, PostCode, City, Country
4. Login with facebook is applied but its not working for some reason needs to check this

Please do apply on if you agree with the given budget,

Regards,
Kamran