Client management

• Download NDF.
• Generate a secure password.
• Handle secure password storage with the iOS keychain.
• Create and store a new client.
• Load stored client.
• Remove stored client.
• Example app with all of the above.

ElixxirDAppsSDK.xcworkspace/xcshareddata/swiftpm/Package.resolved

@@ -9,6 +9,15 @@
         "version" : "0.5.3"
       }
     },
+    {
+      "identity" : "keychainaccess",
+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/kishikawakatsumi/KeychainAccess.git",
+      "state" : {
+        "revision" : "84e546727d66f1adc5439debad16270d0fdd04e7",
+        "version" : "4.2.2"
+      }
+    },
     {
       "identity" : "swift-case-paths",
       "kind" : "remoteSourceControl",