Update OSMLogin.swift

Added documentation for OSMLogin

Author: susrisha

GoInfoGame/osmapi/OSMLogin.swift

@@ -6,26 +6,32 @@
 //
 
 import Foundation
+/// Structure to store the user credentials
 public struct OSMLogin {
+    /// user name
     let username: String
+    /// the password
     let password: String
 
-    // Header information needed
+    /// Fetches the header information to be added
+    /// - returns String
     func getHeaderData() -> String {
         let loginString = "\(username):\(password)"
         let loginData = loginString.data(using: String.Encoding.utf8)!
         let base64LoginString = loginData.base64EncodedString()
         return base64LoginString
     }
 
+    /// Production credentials
     public static var production : OSMLogin {
          OSMLogin(username: "[email protected]", password: "$$WentCityErwin")
     }
 
+    /// Test server credentials
     public static var test : OSMLogin {
         OSMLogin(username: "[email protected]", password: "a$hwa7hamA") // Need to change
     }
-    
+    /// Dev server credentials
     public static var testOSM : OSMLogin {
         OSMLogin(username: "[email protected]", password: "d.Dgq6J6aBy.dCJ") 
     }