User is not mandatory for UserReport configuration

Author: mbi88

README.md

@@ -47,7 +47,7 @@ $ git submodule add [email protected]:AudienceProject/userreport-ios-sdk.git
 Configure UserReport iOS SDK via `SAK_ID`, `MEDIA_ID` (You can find these values on media setting page) and information about user.
 
 ```swift
-// Create user object
+// Create user object (optional)
 let user = User()
 user.email = "[email protected]"
 

UserReport.podspec

@@ -16,7 +16,7 @@ Pod::Spec.new do |s|
   #
 
   s.name         = "UserReport"
-  s.version      = "0.0.8"
+  s.version      = "0.0.9"
   s.summary      = "UserReport SDK for iOS."
 
   # This description is used to generate tags and improve search results.
@@ -121,5 +121,5 @@ Pod::Spec.new do |s|
   # s.xcconfig = { "HEADER_SEARCH_PATHS" => "$(SDKROOT)/usr/include/libxml2" }
   # s.dependency "JSONKit", "~> 1.4"
 
-  s.swift_version = '4.2' 
+  s.swift_version = '4.2'
 end

UserReport/UserReport/UserReport.swift

@@ -106,7 +106,7 @@ private var sharedInstance: UserReport?
      * - parameter user:    User information
      * - parameter userSettings: Settings set by user
      */
-    @objc public class func configure(sakId: String, mediaId: String, user: User, userSettings: Settings? = nil) {
+    @objc public class func configure(sakId: String, mediaId: String, user: User = User(), userSettings: Settings? = nil) {
         sharedInstance = UserReport(sakId: sakId, mediaId: mediaId, user: user, userSettings: userSettings)
     }