How to access a text file from a built unity generated android application

Actually i am trying to store the username and their score of the game in a database present in a server (local server). Please help me to implement it.

I want the application(game) to read a text file which has the information about the local server. Since the local server can be changed i cant hard-code the server information inside the game. So, if at all the server is changed then i have to edit the text file to fill in the information and then the game reads the information about the server and connects with it.

Please give me ideas to solve the problem.