diff --git a/FullStackCodingBot/FullStackCodingBot.xcodeproj/project.pbxproj b/FullStackCodingBot/FullStackCodingBot.xcodeproj/project.pbxproj
index 64a2b49..e6de1f2 100644
--- a/FullStackCodingBot/FullStackCodingBot.xcodeproj/project.pbxproj
+++ b/FullStackCodingBot/FullStackCodingBot.xcodeproj/project.pbxproj
@@ -21,6 +21,9 @@
 		71307AB126A53C7B00C3191F /* AlertMessage.swift in Sources */ = {isa = PBXBuildFile; fileRef = 71307AB026A53C7B00C3191F /* AlertMessage.swift */; };
 		71307AB926A5437C00C3191F /* StorageTest.swift in Sources */ = {isa = PBXBuildFile; fileRef = 71307AB826A5437C00C3191F /* StorageTest.swift */; };
 		71307AC126A5461700C3191F /* Unit.swift in Sources */ = {isa = PBXBuildFile; fileRef = E45B0AC82692F9CF006FDE3D /* Unit.swift */; };
+		7130B74026FEF8FD00DE90F3 /* LoginManager.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7130B73F26FEF8FD00DE90F3 /* LoginManager.swift */; };
+		7130B74426FEFC4700DE90F3 /* LoginManagerType.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7130B74326FEFC4700DE90F3 /* LoginManagerType.swift */; };
+		7130B74626FEFCDA00DE90F3 /* LoginResult.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7130B74526FEFCDA00DE90F3 /* LoginResult.swift */; };
 		71310C2C26AA596B00733361 /* CoreDataStorage.xcdatamodeld in Sources */ = {isa = PBXBuildFile; fileRef = 71310C2A26AA596B00733361 /* CoreDataStorage.xcdatamodeld */; };
 		71310C2D26AA596B00733361 /* CoreDataStorage.xcdatamodeld in Sources */ = {isa = PBXBuildFile; fileRef = 71310C2A26AA596B00733361 /* CoreDataStorage.xcdatamodeld */; };
 		715A83EE269FE96300C9CEFF /* StoryboardType.swift in Sources */ = {isa = PBXBuildFile; fileRef = 715A83ED269FE96300C9CEFF /* StoryboardType.swift */; };
@@ -180,6 +183,9 @@
 		71307AB626A5437C00C3191F /* Full StackTests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = "Full StackTests.xctest"; sourceTree = BUILT_PRODUCTS_DIR; };
 		71307AB826A5437C00C3191F /* StorageTest.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = StorageTest.swift; sourceTree = "<group>"; };
 		71307ABA26A5437C00C3191F /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
+		7130B73F26FEF8FD00DE90F3 /* LoginManager.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = LoginManager.swift; sourceTree = "<group>"; };
+		7130B74326FEFC4700DE90F3 /* LoginManagerType.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = LoginManagerType.swift; sourceTree = "<group>"; };
+		7130B74526FEFCDA00DE90F3 /* LoginResult.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = LoginResult.swift; sourceTree = "<group>"; };
 		71310C2B26AA596B00733361 /* CoreDataStorage.xcdatamodel */ = {isa = PBXFileReference; lastKnownFileType = wrapper.xcdatamodel; path = CoreDataStorage.xcdatamodel; sourceTree = "<group>"; };
 		715A83ED269FE96300C9CEFF /* StoryboardType.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = StoryboardType.swift; sourceTree = "<group>"; };
 		715C1C9326BCF9FF0025C681 /* StoryViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = StoryViewController.swift; sourceTree = "<group>"; };
@@ -350,12 +356,23 @@
 			path = "Full StackTests";
 			sourceTree = "<group>";
 		};
+		7130B73E26FEF8F100DE90F3 /* LoginManager */ = {
+			isa = PBXGroup;
+			children = (
+				7130B73F26FEF8FD00DE90F3 /* LoginManager.swift */,
+				7130B74326FEFC4700DE90F3 /* LoginManagerType.swift */,
+				7130B74526FEFCDA00DE90F3 /* LoginResult.swift */,
+			);
+			path = LoginManager;
+			sourceTree = "<group>";
+		};
 		715BB20426943CD100286B31 /* Service */ = {
 			isa = PBXGroup;
 			children = (
-				E4336F6426F08A8D0049A5D8 /* Storage */,
-				717EAD3B26A656E200E0CDB7 /* GameLogic */,
+				7130B73E26FEF8F100DE90F3 /* LoginManager */,
 				718F224726C377AA00B2648C /* ErrorManager */,
+				717EAD3B26A656E200E0CDB7 /* GameLogic */,
+				E4336F6426F08A8D0049A5D8 /* Storage */,
 			);
 			path = Service;
 			sourceTree = "<group>";
@@ -1062,6 +1079,7 @@
 				7164BFD2269679C6009769E4 /* MainItemView.swift in Sources */,
 				E4150E9726B8F3E00041DD32 /* TypeWriterView.swift in Sources */,
 				71310C2C26AA596B00733361 /* CoreDataStorage.xcdatamodeld in Sources */,
+				7130B74426FEFC4700DE90F3 /* LoginManagerType.swift in Sources */,
 				E4BF710526AFD45A00E8645F /* TimeManagerType.swift in Sources */,
 				E4336F5F26F083840049A5D8 /* BackUpCenterType.swift in Sources */,
 				710D0D4F2693F6E500244A16 /* ItemCell.swift in Sources */,
@@ -1124,6 +1142,7 @@
 				E4DF614126A92CE00061F6E9 /* ShopItem.swift in Sources */,
 				E4F4304426C4F8F500F046E9 /* GameStoryManager.swift in Sources */,
 				E4F4304626CA2E4500F046E9 /* UnitInfo.swift in Sources */,
+				7130B74626FEFCDA00DE90F3 /* LoginResult.swift in Sources */,
 				E4BF713B26B7D2CC00E8645F /* SingleSoundEffectStation.swift in Sources */,
 				E4D7C6422693E7B200D58BA2 /* MainViewController.swift in Sources */,
 				E4150EA126BE44BD0041DD32 /* FullImageStoryView.swift in Sources */,
@@ -1141,6 +1160,7 @@
 				71E91E1726BA33190016386E /* Extension.swift in Sources */,
 				7170CD4526B266BE00F03248 /* VersionErrorViewController.swift in Sources */,
 				719D0D9026F1863200913BBE /* MainScene.swift in Sources */,
+				7130B74026FEF8FD00DE90F3 /* LoginManager.swift in Sources */,
 				E4CA08B926A8287B00AA6F03 /* Font.swift in Sources */,
 				E4BF710B26B1324500E8645F /* ReadyView.swift in Sources */,
 				71DF64B92692C13A00557693 /* ShopViewController.swift in Sources */,
diff --git a/FullStackCodingBot/FullStackCodingBot/Service/LoginManager/LoginManager.swift b/FullStackCodingBot/FullStackCodingBot/Service/LoginManager/LoginManager.swift
new file mode 100644
index 0000000..edc368c
--- /dev/null
+++ b/FullStackCodingBot/FullStackCodingBot/Service/LoginManager/LoginManager.swift
@@ -0,0 +1,54 @@
+import Foundation
+import RxSwift
+import GameKit
+import FirebaseAuth
+
+final class LoginManager: NSObject, LoginManagerType {
+    
+    func getLoginResult() -> Observable<LoginResult> {
+        Observable.create { observer in
+            var result = LoginResult()
+            GKLocalPlayer.local.authenticateHandler = { gcViewController, error in
+                
+                if let gcViewController = gcViewController {
+                    result.gameVC = gcViewController
+                    observer.onNext(result)
+                    
+                } else if let error = error {
+                    observer.onError(error)
+                    
+                } else {
+                    GameCenterAuthProvider.getCredential { credential, error in
+                        
+                        if let error = error {
+                            observer.onError(error)
+                        }
+                        
+                        guard let credential = credential else {
+                            return
+                        }
+                        
+                        Auth.auth().signIn(with: credential) { user, error in
+                            if let error = error {
+                                observer.onError(error)
+                            }
+                            
+                            if let user = user {
+                                result.uuid = user.user.uid
+                                observer.onNext(result)
+                                observer.onCompleted()
+                            }
+                        }
+                    }
+                }
+            }
+            return Disposables.create()
+        }
+    }
+}
+
+extension LoginManager: GKGameCenterControllerDelegate {
+    
+    func gameCenterViewControllerDidFinish(_ gameCenterViewController: GKGameCenterViewController) {
+    }
+}
diff --git a/FullStackCodingBot/FullStackCodingBot/Service/LoginManager/LoginManagerType.swift b/FullStackCodingBot/FullStackCodingBot/Service/LoginManager/LoginManagerType.swift
new file mode 100644
index 0000000..7f00fce
--- /dev/null
+++ b/FullStackCodingBot/FullStackCodingBot/Service/LoginManager/LoginManagerType.swift
@@ -0,0 +1,8 @@
+import Foundation
+import RxSwift
+import GameKit
+
+protocol LoginManagerType {
+    func getLoginResult() -> Observable<LoginResult>
+}
+
diff --git a/FullStackCodingBot/FullStackCodingBot/Service/LoginManager/LoginResult.swift b/FullStackCodingBot/FullStackCodingBot/Service/LoginManager/LoginResult.swift
new file mode 100644
index 0000000..6f18bd2
--- /dev/null
+++ b/FullStackCodingBot/FullStackCodingBot/Service/LoginManager/LoginResult.swift
@@ -0,0 +1,6 @@
+import UIKit
+
+struct LoginResult {
+    var gameVC: UIViewController?
+    var uuid: String?
+}