diff --git a/Libraries/.swiftpm/xcode/xcshareddata/xcschemes/Libraries.xcscheme b/Libraries/.swiftpm/xcode/xcshareddata/xcschemes/Libraries.xcscheme
new file mode 100644
index 0000000..d847438
--- /dev/null
+++ b/Libraries/.swiftpm/xcode/xcshareddata/xcschemes/Libraries.xcscheme
@@ -0,0 +1,92 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "1410"
+   version = "1.3">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "Libraries"
+               BuildableName = "Libraries"
+               BlueprintName = "Libraries"
+               ReferencedContainer = "container:">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      codeCoverageEnabled = "YES">
+      <Testables>
+         <TestableReference
+            skipped = "NO"
+            parallelizable = "YES"
+            testExecutionOrdering = "random">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "APIServiceTests"
+               BuildableName = "APIServiceTests"
+               BlueprintName = "APIServiceTests"
+               ReferencedContainer = "container:">
+            </BuildableReference>
+         </TestableReference>
+         <TestableReference
+            skipped = "NO"
+            parallelizable = "YES"
+            testExecutionOrdering = "random">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "KeychainStorageTests"
+               BuildableName = "KeychainStorageTests"
+               BlueprintName = "KeychainStorageTests"
+               ReferencedContainer = "container:">
+            </BuildableReference>
+         </TestableReference>
+      </Testables>
+   </TestAction>
+   <LaunchAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      allowLocationSimulation = "YES">
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Release"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "Libraries"
+            BuildableName = "Libraries"
+            BlueprintName = "Libraries"
+            ReferencedContainer = "container:">
+         </BuildableReference>
+      </MacroExpansion>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>
diff --git a/Libraries/Package.swift b/Libraries/Package.swift
index 8e572f0..9620c9d 100644
--- a/Libraries/Package.swift
+++ b/Libraries/Package.swift
@@ -14,13 +14,28 @@ let package = Package(
             ]
         ),
     ],
-    dependencies: [],
+    dependencies: [
+        .package(
+            url: "https://github.com/kishikawakatsumi/KeychainAccess.git",
+            from: "4.0.0"
+        ),
+    ],
     targets: [
         .target(name: "APIService"),
         .target(name: "DependencyService"),
+        .target(
+            name: "KeychainStorage",
+            dependencies: [
+                "KeychainAccess"
+            ]
+        ),
         .testTarget(
             name: "APIServiceTests",
             dependencies: ["APIService"]
         ),
+        .testTarget(
+            name: "KeychainStorageTests",
+            dependencies: ["KeychainStorage"]
+        )
     ]
 )