Account recovery/backup feature

Sources/DropboxFeature/DropboxService.swift

@@ -6,7 +6,11 @@ public struct DropboxService: DropboxInterface {
     private let didAuthorizeSubject = PassthroughSubject<Result<Bool, Error>, Never>()
 
     public init() {
-        DropboxClientsManager.setupWithAppKey("ppx0de5f16p9aq2")
+        let path = Bundle.module.path(forResource: "Dropbox-Keys", ofType: "plist")
+        let url = URL(fileURLWithPath: path!)
+        let keys = try! NSDictionary(contentsOf: url, error: ())
+
+        DropboxClientsManager.setupWithAppKey(keys["DROPBOX_APP_KEY"] as! String)
     }
 
     public func unlink() {